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Metra 70-7903 Receiver Wiring Harness

Connect a new car stereo in select 2001-up Mazda vehicles

81 Reviews | 1 question - 1 answer

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Overview

This vehicle-specific wiring harness makes connections between your new car stereo and your car's electrical system.

Metra 70-7903 wiring harness

This vehicle-specific wiring harness makes connections between your new car stereo and your car's electrical system.

First, attach the color-coded wires on your Crutchfield-supplied harness to the wires from your new stereo. If you're not using a soldering iron, we recommend that you purchase some wire connectors to secure the connections. Check out our handy article on three ways to connect the wiring harness here.

Now, once this harness is connected to your new stereo, you'll be able to plug right into your car's factory radio connector. This harness saves installation time since you won't have to cut factory wires individually, and it also enables you to re-install the factory radio if needed. A detailed instruction sheet comes with the harness. Warranty: 60 days.

Please read this important note: This harness may not contain provisions for every wire needed to complete your installation, and it will not accommodate special navigation, video, or factory steering wheel control connections. You will need a special adapter if you want your factory steering wheel audio controls to work with your new stereo.

Connections:

  • 12V constant power
  • 12V switched power
  • chassis ground
  • power antenna turn-on
  • illumination
  • left front speaker +/-
  • right front speaker +/-
  • left rear speaker +/-
  • right rear speaker +/-

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.

Perfect

Anonymous, Roanoke, VA

What's in the Box:

  • Receiver wiring harness
Reviews

Metra 70-7903 Receiver Wiring Harness Reviews

Average Customer Review(s):

(81 Reviews)

Metra 70-7903 Receiver Wiring Harness

Anonymous from Roanoke, VA on 9/6/2017

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Perfect

Pros:

Cons:

Read This if You Want to Keep Steeing Wheel Controls

Bryan from Minneapolis, MN on 5/30/2017

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

I bought this for a 2007 NC Miata, and if you are not going to retain your steering wheel controls, this kit is great as is. I only gave it 4 stars because I did buy the Axxess ASWC-1 Steering Wheel Control Adapter so I could retain my steering controls, but this adapter is missing the two pins needed to finish the job. The wiring for the steering controls are in this same harness, so to make it work you have to either cut into the factory wiring before the adapter, and solder/crimp the Axxess wires in by hand (icky), or buy two of these adapters, and steal the 2 necessary wires and pins from the extra connector, and add them into the connector you will be using. (they come out and in pretty easily if you use a jewelers screwdriver to depress the tiny tab that locks them in place. ) After that it worked great. Not sure why Metra doesn't just spend the extra 2 cents to include the other two pins needed, and save us the expense of having to buy two adapters. Oh wait. Looks like I answered my own question.... :-)

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from Cape Coral, FL on 4/4/2017

2001 Mazda Protege
Crutchfield Customer Review (What's this?)

Less than an hour intall with this kit! Awesome.

Pros:

Cons:

With Steering Wheel Control Wires!

Louis from Colorado Springs, CO on 3/19/2017

2013 Mazda MX5
Crutchfield Customer Review (What's this?)

Now with Steering Wheel Control Wires! Those are 1N and 1P on Mazda wiring that was not in previous editions of this harness. Sadly there's no way to tell in model number, you just have to look for labels that show later 2009-2015 Mazda models. Easy to wire up, so long as you are handy with a crimp tool and Download the Manual from their website. just going by wiring diagrams for the package can show you only so many of the wire, some such as steering controls are left out. Be sure to crimp with copper from both wires touching each other. To achieve this on 22 gauge wires, I used 16 gauge weather proof connectors, then passed the wires through to overlap each other.

Pros: With Steering Wheel Control Wires. Package shows most wiring pin outs.

Cons: No way to tell steering wheel control feature by product model or version. Full pin out diagram is found only online.

Metra 70-7903 Receiver Wiring Harness

Anonymous from El Dorado Hills, CA on 3/19/2017

2013 Mazda 3
Crutchfield Customer Review (What's this?)

Perfect fit no problems

Pros: Easy install

Cons: None

No wiring for steering wheel controls

Rob from Olathe, KS on 2/17/2017

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Honestly, could Crutchfield not afford to put one more wire into this harness so that I could use my steering wheel controls? This is ridiculous. I shouldn't have to go down to the local electronics store to get a pin pusher and another wire for the harness just because Crutchfield cheaped out on the extra wire needed. Literally all this thing needs is one more wire. That's it. One wire separating this from a five star review. Ridiculous.

Pros: Has all the wires but one.

Cons: Missing a really important wire to control the steering wheel volume, etc..

Straight forward install that worked great

Anonymous from College Station, TX on 2/14/2017

2004 Mazda 3
Crutchfield Customer Review (What's this?)

Simple and straight forward. I am not sure what else I can say, but it worked great. Good price.

Pros: Felt substantial Wires came precut for stripping Straight forward

Cons: None

Great Harness

Conard from Wichita, KS on 1/21/2017

2011 Mazda 3
Crutchfield Customer Review (What's this?)

Instructions were great. wired up very nicely. I don't have much experience installing systems or wiring but this made it easy.

Pros: Easy to wire up Instructions clear

Cons:

No problems

Mark from Seattle, WA on 1/7/2017

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

This is at least my second, maybe third head unit replacement (different cars) from Crutchfield. GREAT instructions, perfect fit, I've never had to call customer support.

Pros: Easy to follow color code on the bag.

Cons: Hard to get the plug out of my old one -- but that isn't the harnesses fault, that's on Mazda.

Metra 70-7903 Receiver Wiring Harness

Anonymous from Edmond, OK on 1/3/2017

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

perfect fit, fast and easy

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from Chantilly, Va on 1/2/2017

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

Very good quality and fit

Pros:

Cons:

Fit perfectly

Elijah from Pittsburgh, PA on 1/1/2017

2015 Mazda 6
Crutchfield Customer Review (What's this?)

Worked as advertised, no issues

Pros: Matched the factory harness perfectly

Cons:

Missing Pins for NC MX-5 Miata

JR from St. Louis, MO on 12/21/2016

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Almost 10 years later, Metra still hasn't added the two pins necessary to use this harness with a steering wheel control adapter in an NC MX-5. As many other reviews here have said, you need to purchase two harnesses and pull two pins from one of them to make a complete harness.

Pros:

Cons: Missing pins

Metra 70-7903 Receiver Wiring Harness

Anonymous from Kennewick, WA on 12/14/2016

2002 Mazda Protege5
Crutchfield Customer Review (What's this?)

Very easy to install.

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Denman from Los Angeles, CA on 11/22/2016

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

I wish I had seen Kyle's post for his 2011 Miata. I am installing this in an 07 Miata grand touring with Bose + steering wheel controls and the 70-7903 doesn't have all of the wires the factory harness has. The ridiculous part is the Space is there, but no pin/wire exists for that position. How idiotic? I, like Kyle in his '11 Miata review had to, will now have to splice into factory wiring (defeating the purpose of using a wiring harness completely) just because Metra doesn't have all of the wires in place to account for all of the spaces on the connector. This is easily avoidable. To recap: If you have an NC Miata w/ Bose and steering wheel controls this is Not A Drop In Harness if you plan to retain the steering wheel control. You will need to tap/cut&splice two wires off the factory harness to the steering wheel unit you select. Huge disappointment on account of Crutchfield (and their tech support as well) for telling me this part was drop in. I don't think I'll be purchasing from Crutchfield again on account of this. If I'm going to have to do all of my own research anyway, what's the point in coming to a place who claims to have done all of the fitment research for me??

Pros: Nicely prepped wires Thick AWG wiring especially on hot/ground leads Quality plastic connector

Cons: Does not have all of the pins populated when they should be

Crutchfield response on 12/6/2016 Thanks to Denman's review, Darren, our Vehicle Integration Buyer, is reviewing how we present our steering wheel interfaces in our system. Prior to this comment, we also included wiring advisories for our steering wheel control interfaces to let customers know that in many cases, cutting and splicing wires is necessary for installation.

Could have been great but is a huge disappointment

Kyle from Dothan, AL on 11/14/2016

2011 Mazda MX5
Crutchfield Customer Review (What's this?)

I wish I could give this wiring harness a 5 star rating but it is supposed to be an all inclusive harness for the vehicle to prevent having to splice any wires on the factory harness in the car. The problem lies with pins 1n and 1p. on an NC miata these 2 pins are used for the steering wheel control units and are needed to connect a steering wheel controls adapter for the radio. The problem with these 2 pins is that they are nonexistant on this wiring harness adapter. because of Metra not taking the extra 2 minutes to add these pins into their harness it required me to cut my factory harness in my car in order to connect the steering wheel controls adapter. This is a major issue to me as I bought this harness so that I didnt have to cut into my cars harness. I consider that a huge failure on Metras part and this needs to be fixed. If i have to cut and strip 2 wires I'd rather have just saved the money on this harness and done it for all of the wires. The problem in this is that you don't know about this until the metra is delivered and you are working on the install. Crutchfield also doesn't advertise this and I believe they should, but they at least told me when I was in live chat with support so they are able to help with the issue.

Pros: easy to use saves time from having to cut and splice MOST wires

Cons: I still had to cut 2 wires on my cars harness for steering wheel controls Needs to have pins 1n and 1p installed in harness

Metra 70-7903 Receiver Wiring Harness

Anonymous from Sevierville, TN on 11/13/2016

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

fast shipping as usual. perfect fitment

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from Broomfield, CO on 10/26/2016

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Two pins were incorrect and required fixing.

Pros:

Cons:

Perfect fit, but one crippling flaw

Ken from Aurora, IL on 10/20/2016

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

I have a 2006 Miata. The harness was a perfect fit, but be aware Metra does not include the pins used for the steering wheel controls - but you can get pins from a second adapter and insert them in the empty holes to enable a plug and play steering wheel adapter installation without cutting and splicing into the car's wiring harness. (Search the web for details.). If the two pins and wires were included, I'd give this five stars.

Pros: Well designed, perfect fit, well made

Cons: Missing pins for steering wheel control

Save yourself a hassle!

Crash from San Luis Obispo, CA on 10/16/2016

2002 Mazda Miata
Crutchfield Customer Review (What's this?)

A must have. Makes things nice and simple, easy to connect wires together.

Pros: Simple and easy to use!

Cons: Doesn't come with the little connectors to crimp down

Metra 70-7903 Receiver Wiring Harness

Anonymous from Durham, NH on 9/7/2016

2012 Mazda 3
Crutchfield Customer Review (What's this?)

Worked great with no problems.

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from 23111 on 9/5/2016

2002 Mazda 626
Crutchfield Customer Review (What's this?)

Fit great makes a good strong conection

Pros:

Cons:

Wiring harness

Martyna from Florida on 8/29/2016

2009 Mazda 5
Crutchfield Customer Review (What's this?)

Works great for my radio!

Pros:

Cons:

Easy connector

D W from New Jersey on 8/23/2016

2002 Mazda MPV
Crutchfield Customer Review (What's this?)

Did not have to splice all the wires for connecting the new system. It is the perfect fit for my vehicle to connect the JVC system. Initially was advised to get the Metra 70-7901 Receiver Wiring Harness but this did not fit after I removed the old stock system. Call to crutchfield with a picture correctly identified this adapter as the correct one needed for my vehicle. Crutchfield shipped it out for free and did not want the Metra 70-7901 Receiver Wiring Harness back either. Wow, didnt think such great service existed any more. All in all a very happy camper.

Pros: Cheap and handy.

Cons: Did not have the steering wheel signal pin and had to splice that wire from the original bundle. ( 2 wires) Not that bad but would have been ideal if they had been in the harness as well.

Wire harness

Gil D from Kilauea, HI on 6/27/2016

2005 Mazda Tribute
Crutchfield Customer Review (What's this?)

Exellent easy to use.

Pros:

Cons:

2002 MAZDA TRIBUTE-Parts_2

Duane from Maricopa, AZ on 5/26/2016

2002 Mazda Tribute
Crutchfield Customer Review (What's this?)

Unknown to myself or the tech I talked to, I needed a different harness since I had a limited edition 6 CD Changer in the old stereo. No ones fault and I worked around it.

Pros: Good quality.

Cons: Wrong part, but not Crutchfield's fault.

wiring adapter

gwm from lakeville,mn on 5/25/2016

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

by utulizing this ur o.e. wiring is left untouched should u every want to install original unit

Pros: simple to connect to jensen unit through matching colors of wires from jensen to wire harness then just plug into o.e. wire loom

Cons: none

Nice

Kev from Lincoln on 4/21/2016

2003 Mazda Tribute
Crutchfield Customer Review (What's this?)

Easy to wire

Pros: Works great

Cons:

Metra 70-7903 Receiver Wiring Harness

Cameron from El Paso, TX on 4/20/2016

2002 Mazda Miata
Crutchfield Customer Review (What's this?)

Easy

Pros:

Cons:

Good quality connector

Illinoisuser from Rockford, IL on 4/2/2016

2005 Mazda 3

Always good quality products from Crutchfield, connector worked great, I do like it has copper wires which makes for better solder connections. I use shrink tubing to seal connections. I like that power wires are better gauge wire too.

Pros: Good quality, proper wiring options for vehicle

Cons: Would like wires to be a little longer but not a big deal

Metra 70-7903 Receiver Wiring Harness

Anon from Minneapolis, MN on 3/28/2016

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

It works. It was included for free with my stereo purchase.

Pros: Wire insulation was pre-cut, so I could simply pull the insulation tips off to prepare them for splicing. I thought that was a nice touch that saved me the time and effort of wire stripping. Wires were color-coded and labeled. For splicing wires, this was about as idiot-proof as they come.

Cons: Crimp caps were not included by Crutchfield, so I used the twist-solder-tape method instead. Soldering makes a better connection, but it was more time consuming. I also happened to have a soldering iron and solder. I doubt the average consumer keeps those in their toolbox.

receiver wiring harness

Anonymous from arlington, TX on 3/16/2016

2003 Mazda Miata
Crutchfield Customer Review (What's this?)

I love this harness. It make wiring so much easier

Pros:

Cons: None

2003 Mazda Tribute

N. Farris from Santa Cruz, CA on 2/3/2016

2003 Mazda Tribute
Crutchfield Customer Review (What's this?)

Wiring harness was as expected, but between this and head unit instructions, it was not as easy as it should have been.

Pros: as expected

Cons: minimal instructions

No Issue

LEO K from California on 1/15/2016

2014 Mazda MX5
Crutchfield Customer Review (What's this?)

Installer had no problem and from look of it wires look durable and reliable

Pros:

Cons:

Harness for 2006 Mazda 3

CG from Texas on 1/9/2016

2006 Mazda 3
Crutchfield Customer Review (What's this?)

Easy to use and good instructions!

Pros: Plugs right into your car and you splice to the stereo harness easily.

Cons: None

Wiring harness

DylanC from Oviedo fl on 1/9/2016

2007 Mazda 3
Crutchfield Customer Review (What's this?)

Nice and easy to install

Pros: Easy and colors matched up nice with factory harness

Cons: None

great harness adapter worked perfectly with minor changes

Wes M. from Florida on 1/6/2016

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

installed on 06 mazda mx5 with axxess steering wheel adapter to Pioneer FH-X720BT. did not add amp or other speakers. I did have to move the blue and blue/white wires over to the 1N and !P positions to which one went to the white and green on the axxess and the 1p to the grounds that the axxess and the radio used. otherwise a flawless installation with easy color matching.

Pros: perfect color matching other than mentioned wire exchange. precut wires make for quick install. perfect fit for my mazda mx5 nc

Cons: had to move to wires that it could have come preinstalled with but move was simple and took 2mins max.

2012 Mazda Dash Install

Kal from Pennsylvania on 1/2/2016

2012 Mazda 3
Crutchfield Customer Review (What's this?)

Nice harness, wire colors match perfectly with a Pioneer receiver. Took some time to figure out the steering wheel control wiring. As much the fault of the wheel control instructions, but something Metra can keep in mind for the next generation of harnesses.

Pros: Easy, straightforward install.

Cons: The only con is, it would be nice if it included pigtails for the steering wheel control adaptor inputs.

About as easy as it could be

nw from Indiana on 12/30/2015

2004 Mazda MPV
Crutchfield Customer Review (What's this?)

The harness was fine - nothing special about it - it worked as expected. Would have liked to have seen some additional options so we didn't have to "tap in" to a few of the lines manually.

Pros: The lines were color coded and labelled appropriately. Some of the lines we weren't going to need were already marked with tape.

Cons: We did have to use "t-taps" to splice into the existing steering wheel lines. While easy enough to do, it was something we had to learn about first with the Crutchfield Representative and stop the project to go purchase additional parts at the hardware store. It was very straightforward to accomplish the install, but I think the kit should have come with these extra pieces. We lost time having to research and buy additional parts.

Missing pins for steering wheel control

Espierce from Alabama on 12/23/2015

2013 Mazda MX5
Crutchfield Customer Review (What's this?)

I had to tap into the wiring harness in order to get to the steering wheel control signals. The addition of two wires on the metra harness would have saved much time. Email to metra tech support were unanswered.

Pros:

Cons:

Easy install

Anonymous from California on 12/6/2015

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

Made the install super easy. Worked like I expected.

Pros: All good

Cons: none

Helpful harness

SteveB from Florida on 12/5/2015

Crutchfield Customer Review (What's this?)

Harness made installation easy.

Pros: Very easy to make all Connections bench then install

Cons:

Exactly what I was looking for

Matthew from Pell City, AL on 11/23/2015

2004 Mazda Tribute
Crutchfield Customer Review (What's this?)

Was exactly what I was looking for, had the wiring diagram on the packaging, and helped with a clean and simple install.

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

The Fixer from California on 11/16/2015

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

Great product It,s dummy proof, all wires are labeled easy to follow instructions

Pros: Great product at a great price

Cons: Wish it came with butt connectors to help on installation for a more pro like install.

Metra 70-7903 Receiver Wiring Harness

TJ from Indiana on 11/16/2015

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

made installation easy

Pros: easy install

Cons: would have been nice if all wires were there for steering wheel control

Steering wheel connectors

HE from SanFrancisco on 11/13/2015

Crutchfield Customer Review (What's this?)

Works perfectly

Pros: Fits the wiring of my Mazda 2 just like an original manufacturer part

Cons: None

Easy install.

Don from New York on 10/28/2015

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Perfect fit.

Pros:

Cons:

Just missed being perfect

W from Monroe, NY on 10/19/2015

Crutchfield Customer Review (What's this?)

With one exception, this adapter was exactly what I needed to install a new head unit in my MX5. The adapter is very well built, and allowed east integration without having to cut any wires. The miss is that two pins necessary to use the steering wheel adapter were missing. There were open holes for the pins, but the pins were not included. There were also no instructions included about what to do to correct the problem. I called Crutchfield tech support, who were great with telling me which pins to move, and how to move them. These instructions should be included with the adapter.

Pros: Ease of install

Cons: Missing pins for my installation. Instructions lacking.

Works Well

Tony!R from Florida on 10/18/2015

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

First one did not work and returned for a new one. Once I received the new one, the installation worked out well. My steering wheel controls all working fine now.

Pros: Works well.

Cons: Instructions on wiring could be better explained or illustrated...Tricky to program.

Adapter Harness

MAH from Indiana on 10/16/2015

2001 Mazda Protege
Crutchfield Customer Review (What's this?)

What can I say, it connected to my 2001 Mazda Proteges dash harness easy as pie and worked.

Pros: No problems

Cons: None

Great

Scott from henderson, nv on 10/12/2015

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

Was easy and quick. I solder the harness and had no issues

Pros: Simple

Cons: Non

Perfect fit

Elio C from Minnesota on 10/8/2015

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Easy to install and program. Works flawlessly

Pros:

Cons:

Simple.

Jim D. from California on 9/29/2015

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Simple way to keep the cars wiring intact.

Pros: All wiring colors matched the Pioneer head unit wiring colors.

Cons: The ONLY con is, it would be nice if it included pins, and pigtails, for the steering wheel control adaptor inputs.

Working Harness

Michael from Pennsylvania on 9/25/2015

Crutchfield Customer Review (What's this?)

My son wanted a new radio for his 2003 Mazda. I Told him I Will do it for you. Its bin a long time since I put a radio in. I mean a long time like when you had to cut the wire harness and try to match the wires. And hope all 4 speakers are working.

Pros: This item was so easy to hook up.It made me look so good to my son .Now I can order a radio for my Ford Escape.Thank you Crutchfield

Cons:

Works perfectly

AviT from Oregon on 9/17/2015

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

Used this to install a new head unit in my wife's 02 Mazda Protege 5. All the colors matched the head unit wire colors, so it was really easy to figure out what wires to connect. Only way to improve this would be to pre-strip, or at least pre-score, the wire insulation.

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from Charleston, SC on 9/15/2015

2008 Mazda 3
Crutchfield Customer Review (What's this?)

Easy enough to solder connections to the aftermarket harness. Solid connection to the factory harness as well.

Pros:

Cons:

Awesome Product

Luke P from Indiana on 9/10/2015

2004 Mazda 6
Crutchfield Customer Review (What's this?)

Made radio installation a breeze.

Pros: easy installation

Cons: none

Metra Harness for MX 5

MedLex from Puerto Rico on 7/27/2015

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Quick and easy ordering and receiving of product. I had to modify it to use Bose amp and speakers, works like a dream very good fit.

Pros: Great fit

Cons: No Bose amp contact

Satisfied

Jorge from Puerto Rico on 7/15/2015

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

All fit perfectly. Very good!

Pros: Easy to undernstand instructions

Cons: None

Missing two wires for steering wheel control

Clint from Massachusetts on 7/12/2015

2006 Mazda 3
Crutchfield Customer Review (What's this?)

Metra neglected to include the two wires used for steering wheel control. Had they been there, you could solder all splices to this harness on the workbench. But as is, you need to splice into the car harness in place. This is not an insignificant pain as there is very little slack for splicing. The whole point of a harness adapter is to circumvent any need to cut into the car wiring itself. Had Metra included those two wires, this would be a 5-star product. Without them it's 2-stars.

Pros:

Cons:

Amazing

Connor from Minnesota on 7/3/2015

2003 Mazda Protege
Crutchfield Customer Review (What's this?)

I love this product. I chatted online and they were able to find me this to install my new radio. It was fast and easy to install with this.

Pros: Fast Easy

Cons: Nothing bad

Just what I needed

Eric from Florida on 6/24/2015

2006 Mazda 5
Crutchfield Customer Review (What's this?)

Got everything I needed on Crutchfield. It all works great!

Pros: Fit perfect and even included full wire diagram for harness

Cons:

Wiring Harness

JohnR from Florida on 6/12/2015

2002 Mazda Miata
Crutchfield Customer Review (What's this?)

Crutchfield provides excellent products and services. When I called for additonal help, they responded quickly and accurately.

Pros:

Cons:

Metra wiring harness

Anonymous from Clarksville, TN on 6/6/2015

2001 Mazda 626
Crutchfield Customer Review (What's this?)

Even I could do it! Straightforward, quick, and easy using provided instructions.

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from New Port Richey, FL on 6/5/2015

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Very straight forward.....no problems

Pros:

Cons:

Metra 70-7903 Receiver Wiring Harness

Anonymous from New Mexico on 6/1/2015

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

missing pins for steering wheel controls

Pros:

Cons:

Beware of missing pins!

Robert from California on 5/26/2015

2004 Mazda 3
Crutchfield Customer Review (What's this?)

This harness was included in Crutchfield's supposedly complete solution to add a new head unit to my 2004 Mazda3. When I went to do the install I was dismayed to learn that the harness did not have 2 pins needed to connect the steering wheel controls adapter. When I called Crutchfield they told me I needed to "hardwire" (as in hack into my factory wiring harness) the steering wheel control adapter. After I called to RMA the radio and everything else Crutchfield sent me a second wiring harness which I was able to cannibalize to the harness the pins I needed.. While I am satisfied that Crutchfield ultimately helped me solve this problem they should not have sold an incomplete solution to begin with and Metra should stop cheaping out and include the pins people need to use.

Pros: Not that difficult to remove pins from a "donor" harness to build a complete harness.

Cons: Missing pins.

no pin out for steering wheel controls

Anonymous from Wisconsin on 5/25/2015

2015 Mazda MX5
Crutchfield Customer Review (What's this?)

no pin out for steering wheel controls, other then that good product

Pros:

Cons:

Great but...

Mike V from Simi Valley, California on 5/16/2015

Crutchfield Customer Review (What's this?)

Provides easy hook up for basic install but was missing 2 wires to hook up the steering wheel controls.

Pros: Great quality

Cons: does not have wires to connect the OEM steering wheel control!

Close but not complete for 2009 Mazda MX5

Garnetmica from Massachusetts on 5/12/2015

Crutchfield Customer Review (What's this?)

I had to purchase a second harness in order to get the steering wheel controls in my 2009 Mazda MX5 w/o Bose to work with my Alpine ILX-007. There are two missing pins. I purchased a second harness and had to carefully remove the pins in order to install them in the 1N and 1P locations. There were many people reporting the same issue on the Miata forums so I was lucky to have had some outside guidance.

Pros: Most of it there. The quality of the harness, wires and pins are very good.

Cons: Had to buy a second harness to add pins for steering wheel controls.

Good product

Chad from Brooklyn, mi on 5/8/2015

2007 Mazda MX5
Crutchfield Customer Review (What's this?)

Made installation a breeze.

Pros:

Cons:

Very Good Harness

Tj from Frederick MD on 4/10/2015

2004 Mazda Tribute
Crutchfield Customer Review (What's this?)

Excellent installation kit. Fit the factory harness perfectly

Pros:

Cons:

Great harness!

Anonymous from Maryland on 4/8/2015

2007 Mazda 3
Crutchfield Customer Review (What's this?)

This Metra harness fit seamlessly mated my new Kenwood head unit to my 2007 Mazda 3. The harness included 2 connectors (powered antenna and remote amp) that were not being used. I was able to re-pin the unused wires to other places on the harness for connecting my new PAC-SWI-RC steering wheel control which prevented me from splicing into the factory wires which I was trying to avoid at all costs. This is a great harness, I would not hesitate to buy another when the need comes.

Pros: fits perfect, extra wires (in my case)

Cons: None

Needed but pins wrong

Jmk from Redmond, WA on 2/22/2015

2006 Mazda MX5
Crutchfield Customer Review (What's this?)

Look, you need it. On my car, 2 of the pins that connected to the Axxess box and the antenna power were incorrect. After not getting this to work and a call to Crutchfield not helping, I noticed the wire mismatch when snapping the shells together. Took a few minutes to swap pins. It all worked fine. Cost me some head angling over two evenings. :-(

Pros: You need it

Cons: You need it to be correct

It works

Doober from California on 2/10/2015

2002 Mazda Protege
Crutchfield Customer Review (What's this?)

It works. Hooray.

Pros:

Cons:

Cheaped out

ChrisC from Phoenix, AZ on 2/6/2015

2008 Mazda MX5
Crutchfield Customer Review (What's this?)

Sadly, the manufacturer cheaped out with the harness. Only about half of the wires on the stock harness are filled. This isn't necessarily a bad thing, but they didn't include the pins and wires for the steering wheel radio controls! So I had to move the amp connections over to the steering wheel radio pins (because I don't have an amp and had the non-bose radio). It was a pain pushing the pins out and then plugging them into the correct spots. Another $0.25 of wires and pins would have made this so much easier. I have a 2008 Mazda Miata, non-Bose radio and steering wheel radio controls.

Pros: Don't have to cut into the stock harness. Plugs in perfectly. Colors on wires are industry standard.

Cons: Not all pin spots filled. Need to modify the wiring so it'll work with the steering wheel controls or cut into the car radio harness.

Beginner

Daniel A. from Naperville, IL on 1/19/2015

My first time wiring a aftermarket radio and it was really simple u just matched the colors and u can put your stock radio back in whenever u want too.

Pros: Very easy and simple u don't really need the instructions.

Cons: the should make it a double way adapter.

Works as advertised

Anonymous from Grandville, MI on 1/16/2015

2005 Mazda 3
Crutchfield Customer Review (What's this?)

Does the job well.

Pros: Works great, easy and quick install.

Cons: None

Metra 70-7903 Receiver Wiring Harness

Edwin from California on 1/1/2015

Crutchfield Customer Review (What's this?)

Simple wire harness

Pros: Easy set up and installion.

Cons: None

Needs help

Ken from Sedona, AZ on 11/18/2014

Crutchfield Customer Review (What's this?)

The harness fits a Miata but 2 of the pins don't have or match the factory harness, hence you need to bypass the harness union...not good as they don't tell you this!

Pros:

Cons:

AMAZING and Simply

Mr Bacon from Las Vegas, NV on 11/3/2014

2003 Mazda MPV
Crutchfield Customer Review (What's this?)

Easy and best way to use the current wiring even with factory amp and sub woofer.

Pros: Easy and simply

Cons: NONE

Works perfectly

Lee from Boston, MA on 8/23/2005

2003 Mazda Protege5
Crutchfield Customer Review (What's this?)

Took me 15 minutes to wire this harness up to my Kenwood stereo. Didn't really need the directions as the color codings were pretty much dead on. It even works with the dimmer in my car. Great product.

Pros:

Cons:

Details

Hands-on research

Product Research

Features

Crutchfield Wiring Harness: Crutchfield wiring harnesses prevent you from having to cut your vehicle's factory radio plug when replacing your factory radio with an aftermarket head unit. Simply solder or crimp the Crutchfield wiring harness to your aftermarket head unit's harness (solder & crimps not included), plug the aftermarket head unit's plug into the rear chassis of the aftermarket head unit, and plug the Crutchfield wiring harness into your vehicle's factory radio plug.

Note: Installation tools, hardware, & accessories are not included & sold separately. Please see the Accessories tab for recommendations & availability.

Wiring Notes: If the Crutchfield wiring harness is not equipped with a ground wire, you will need to ground the aftermarket head unit's ground wire to the metal chassis of your vehicle. Some vehicle's may require you to bypass the vehicle's factory amplifier (in another location from factory radio) or hardwire certain connections. If your vehicle is equipped with factory steering wheel controls, an additional adapter is required & sold separately.

Wire Code Chart:

Wire ColorFunction
Red+12 Volt Accessory
Yellow+12 Volt Constant
BlackChassis Ground
BluePower Antenna
Blue/whiteAmp Turn-On
OrangeIllumination
WhiteLeft Front Speaker +
White/BlackLeft Front Speaker -
GrayRight Front Speaker +
Gray/BlackRight Front Speaker -
GreenLeft Rear Speaker +
Green/BlackLeft Rear Speaker -
VioletRight Rear Speaker +
Violet/BlackRight Rear Speaker -

The Crutchfield Car Selector: Please visit theCrutchfield Car Selector for your specific type of vehicle.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

It is the harness needed for the car.[ Anthony  Aug 28, 2017 ]
Required for installation.[ Brian  Aug 10, 2017 ]
Clean hookup[ Robert  Aug 03, 2017 ]
Came complimentary with the purchase of the receiver. Love Crutchfield...[ Eric  Jul 30, 2017 ]
Easy hook up and disconnect.[ Mike Nas  Jul 22, 2017 ]
Ease of use[ Chris  Jul 20, 2017 ]
much much easier than cutting wires[ STEVEN  Jul 16, 2017 ]
Easy compatibility between receiver and factory wiring...and it was free![ Bryan  Jun 18, 2017 ]
To install a new stereo in my miata[ Brad  Jun 13, 2017 ]
I want to continue using my steering wheel controls with my aftermarket car stereo.[ Robert  Jun 03, 2017 ]
to complete instlation of gift radio[ carmabn body  May 30, 2017 ]
Ease of install[ Rodger  May 24, 2017 ]
Fits 2002 Mazda Protege Sedan[ Hongbiao  May 21, 2017 ]
the harness makes the installation easier.[ Peter  May 19, 2017 ]
Super simple, just connect the colors, plug it in.[ Anders  May 16, 2017 ]
Easy install[ Chase  May 15, 2017 ]
My car was broken into and it was torn out[ Aislinn  May 04, 2017 ]
Need this for new stereo[ KRISTI J  May 03, 2017 ]
This was the recommended compatible kit for my 2014 Mazda 6.[ Keith  Apr 28, 2017 ]
It was a direct fit for my vehicle, and name brand at a good price.[ Andrew  Apr 25, 2017 ]
Needed for my 2014 Mazda 6 Pioneer install[ David  Apr 13, 2017 ]
I need it since no one around me stocked them, So knowing Crutchfield is the saving grace store for audio stuff I bought it from here.[ Richard  Apr 07, 2017 ]
To make installation easier[ V  Apr 01, 2017 ]
Because it makes install easy and clean with no modifications to the factory wiring[ Michael  Mar 24, 2017 ]
To ease the installation of a new receiver in my 2010 MX-5.[ Britt  Mar 19, 2017 ]
need[ Debbie  Mar 15, 2017 ]
ease of ordering[ eddie  Mar 15, 2017 ]
Because you cannot connect the radio without it![ Timothy  Mar 14, 2017 ]
Needed[ Brad  Mar 01, 2017 ]
It was suggested on the web page, and with my other crutchfield orders it has made installation so much simpler![ Michael  Feb 08, 2017 ]
makes installing the system a snap. Why would you not get the right parts the first time![ Gary  Jan 25, 2017 ]
Metra is reputable after market mftr of installation kits...this product best fits my need for a relatively seamless installation of my soon to be new Kenwood 373BT double DIN receiver in my 2006 Mazda 3......and I have been a loyal Crutchfield customer for 30 years.Regards, Kevin[ KEVIN  Dec 14, 2016 ]
Easy to integrate with the car's factory harness and alllows me to easily put back the factory radio if I want to later on.[ Michael  Dec 12, 2016 ]
FREE and it makes installing much easier.[ Rick  Nov 13, 2016 ]
To interface with steering wheel controls[ LYNLEE  Oct 12, 2016 ]
good price and backed by crutchfield[ James  Oct 01, 2016 ]
recommended for my vehicle[ TODD A  Sep 24, 2016 ]
It seemed more convenient to wire the radio sitting at the kitchen table, rather than lying on the floor under the dash.[ David  Aug 25, 2016 ]
Thrown in with the stereo![ C  Aug 15, 2016 ]
Convenience[ WAYMON  Jul 30, 2016 ]
Good reviews and price[ Davin  Jul 18, 2016 ]
They were recommend for my cars installation[ sarah elena  Jul 14, 2016 ]
came with[ Aaron Trent  Jul 11, 2016 ]
i needed it[ Anthony  Jul 08, 2016 ]
So that I have a good and easy connection[ Philip  Jun 21, 2016 ]
I have been using Metra products for over 20 years. They always fit my project and they're easy to install.[ Thomas  Jun 14, 2016 ]
Dope[ Caleb Andrew  Jun 10, 2016 ]
Needed for installation[ Eric  Jun 08, 2016 ]
Better that cut cables.[ Carlos  May 21, 2016 ]
Needed for install.[ Joshua  May 14, 2016 ]
Good price and best fit for my Miata.[ Ben  May 04, 2016 ]
Makes install much easier and keep the factory wiring intact[ stephen  Apr 26, 2016 ]
Makes it easy to swap back the factory stereo when selling your vehicle. Limits the wires you will need to chop up for the factory harness. In my 05 mazda 3 I still had to 1 wire to interface my aftermarket head unit with a PAC SWC for illumination[ ROBERT  Apr 18, 2016 ]
This I got to match the car cables to the new stereo cables , might not need it though.[ Ariel  Apr 08, 2016 ]
I want to make sure speaker wiring match the vehicle factory harness[ Wilfredo  Apr 05, 2016 ]
Ease of install.[ maurice  Apr 02, 2016 ]
It was free with the receiver[ Jonathan  Mar 21, 2016 ]
I chose this item because I prefer a clean professional look when I replace a factory radio. This item eliminates the need to splice wires.[ Stephen  Mar 19, 2016 ]
Makes wiring a breeze. Color match and you're done.[ Ann  Feb 16, 2016 ]
I do not know what it is going to take to install the radio. I need something to interface the car wiring harnest to the radio[ Michael  Feb 14, 2016 ]
why cut the factory harness? [ Jacob  Feb 10, 2016 ]
I chose this because it was needed for the stereo head unit that I purchased.[ Blake  Jan 14, 2016 ]
These have worked great in the past. This one will be my 4th or 5th through Crutchfield. I have only had 1 install issue, and they had me on the right track in minutes. Takes some time, but, is easy. Do a good solder, use shrink tube, and you will look like a pro. Beats the heck out of rewiring the entire system.[ Earl  Dec 15, 2015 ]
It's we what I needed to install the stereo, plus it was free[ Terry  Dec 10, 2015 ]
Based on my history with Crutchfield, if they recommend it, I order it.....Crutchfield has the best service, bar none!![ Kevin  Dec 08, 2015 ]

1 question already asked

For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.[ Krissy  Sep 14, 2015 ]  Staff
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