Skip Navigation

PAC RP4-MZ11 Wiring Interface

Connect a new stereo and retain steering wheel audio controls, entertainment system, safety warning chimes, and factory amp in select 2008-up Mazdas

44 Reviews | 11 questions - 15 answers

Find what fits your vehicle

 
 
 
 

Can't find your exact vehicle?

Item # 541RP4MZ11

In Stock

Add to Cart

Ask an expert

Our VA-based experts can help.

1.888.955.6000

ChatEmail

Overview

Our take on the PAC RP4-MZ11 Wiring Interface

PAC's RP4-MZ11 radio replacement interface lets you replace the factory radio in select 2008-up Mazdas. You'll retain your factory steering wheel audio controls, your vehicle's entertainment system, warning chimes, and the use of your factory amplifier, if present. This interface works with your Mazda's base or premium stereo systems, and retains all safety and convenience features. You'll also retain your Mazda's message display, which allows you to access your vehicle's system settings. Warranty: 1 year.

PAC's RP4-MZ11 radio replacement interface lets you replace the factory radio in select 2008-up Mazdas. You'll retain your factory steering wheel audio controls, your vehicle's entertainment system, warning chimes, and the use of your factory amplifier, if present. This interface works with your Mazda's base or premium stereo systems, and retains all safety and convenience features. You'll also retain your Mazda's message display, which allows you to access your vehicle's system settings. Warranty: 1 year.

Important Note: If your vehicle is equipped with the factory premium system, the amp fader must be adjusted through the RP interface. (See Details.) See Details for a list of compatible car stereos.

Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this model is compatible with your vehicle.

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.

Worked perfect. Installed a Pioneer into a 2012 Mazda 3 with no problems.

Richard, Albuquerque NM

What's in the Box:

  • Radio replacement/SWC interface module (for Mazda)
  • Wiring harness (RP4-MZ11-HAR)
  • Steering wheel control harness (4-pin connector to 3.5mm/blue wire)
  • Instructions
Reviews

PAC RP4-MZ11 Wiring Interface Reviews

Average Customer Review(s):

(44 Reviews)

Works Great

Richard from Albuquerque NM on 9/21/2017

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

Worked perfect. Installed a Pioneer into a 2012 Mazda 3 with no problems.

Pros: Works as advertised, easy install.

Cons: Wish install instructions were clearer. In particular, a better wiring diagram. I prefer to use a diagram over reading a long instruction sheet.

Seamless integration!

Eric from Schertz, TX on 9/10/2017

2008 Mazda CX-9
Crutchfield Customer Review (What's this?)

08 Mazda CX-9 with Bose and RSES. Installed a Pioneer AVH-X4800BS using this interface and mostly everything worked as it should. SWC worked except for the phone button, I have to do it from the receiver. A word of caution (and this is not against the PAC): if you have this similar vehicle you will lose fader functionality if you install I believe any aftermarket receiver. Before removing your old radio you must set your volume to 3/4 max and put fader and balance to dead center before installing a new receiver.

Pros:

Cons: Phone button on steering wheel does not work - minor inconvenience.

PAC RP4-MZ11 Wiring Interface

Anonymous from Oklahoma City, OK on 8/19/2017

2013 Mazda 5
Crutchfield Customer Review (What's this?)

Instructions could b a little more clear to non savvy installers. Had to call crutchfield for help with certain wires.

Pros:

Cons:

PAC RP4-MZ11 Wiring Interface

Anonymous from Sparks, NV on 8/13/2017

2009 Mazda 3
Crutchfield Customer Review (What's this?)

I could not understand the instructions, so I returned this product and used a standard wiring harness from Metra. The stereo works great, but the steering wheel controls obviously do not work. If I were a more experienced stereo installer this kit would probably have worked, but I'm not sure it even would have fit behind the stereo. It was a tight fit with just the standard harness.

Pros:

Cons:

Good product, missing information in instructions

Chuck from Irvine, CA on 8/13/2017

2010 Mazda 6
Crutchfield Customer Review (What's this?)

The product is feature rich, but the instructions were not clear. I expected more from a product that is vehicle specific and at this price. Where the instructions failed me: - Didn't specify that one of the stock radio connections was abandoned during install (had to call Crutchfield support to verify) - Didn't specify that you need to cut the RCA connectors off the speaker leads for non-amplifier installations. - Instructions are detailed but missing key information, such as explaining their naming convention for connector types (vehicle/interface). Especially confusing when a stock connector is abandoned as part of the installation. - Duplicate connections coming from vehicle and interface connectors (reverse and illumination), confusing which to use (I chose the rock-paper-scissors selection method...unsuccessfully) - bad instructions caused install to take much longer than it should.

Pros: Retains steering wheel controls Can retain all stock connections Allows for custom programming of buttons with short/long pulse options.

Cons: Missing parts of instructions cause install to take much longer than it should

PAC RP4-MZ11

Anonymous from East Hartford, CT on 8/5/2017

2009 Mazda 3
Crutchfield Customer Review (What's this?)

After an in depth discussion on SWC options for my mazda3 with a Crutchfield rep, I Ordered this unit for my 09 with a Sony deck. The instructions and wiring were simply however i have two major issues with the cars stock lcd displays. -the trip computer is no longer displayed or an option in the sub menue -the ambient temperature is now in Celcius with no options to change it back??(previous unit you pushed the stock units two buttons) Not real happy but in the end, i didn't pay alot so it is what it is. suggestion: make some software improvements to the pac unit id guess

Pros: simple install works with various makes of radio

Cons: lost features which the unit was suppose keep

Crutchfield response on 8/7/2017 Once we saw this review, our Tech Support team reached out to this customer to help him further. We'll either help him get the interface working the way it should, or help him return it for an exchange or refund.

PAC RP4-MZ11 Wiring Interface

Anonymous from Prairieville,La. on 5/12/2017

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

It made it real easy to install.

Pros:

Cons:

IN THE END ALL WAS GOOD

Dave from FISHKILL, NY on 4/30/2017

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

Not the best in directions..I hate to call for help..I also had to cut the rca ends off for the high normal outputs of the radio...poor design poor instructions But tech help walked me through it and in the end it all worked out

Pros: It worked after talking to tech support

Cons: One shouldnt need to cut a harness by removing the rca jacks and wiring to speaker out of radio

Works well (with issues)

Anonymous from Mount Pleasant, SC on 4/23/2017

2010 Mazda 3
Crutchfield Customer Review (What's this?)

Great interface; all of my steering wheel controls work without a hitch. However, this unit does interfere with my gas mileage readout on the secondary screen in my Mazda 3. Not a huge deal, but I still have access to instantaneous gas mileage numbers, as well as miles to empty calculations. Easy to install.....

Pros: Easy install, Retains most steering wheel controls, Easy to program (if necessary)

Cons: Lose Gas Mileage calculations in Mazda 3

PAC RP4-MZ11 Wiring Interface

Anonymous from Sammamish, WA on 4/22/2017

2010 Mazda CX-9
Crutchfield Customer Review (What's this?)

This was confusing for Mazda CX-9 and Pioneer receiver - the receiver output native match were unamplified so cutting and soldering wires directly was required instead.

Pros:

Cons:

PAC RP4-MZ11 Wiring Interface

odell from Bethlehem, PA on 2/20/2017

2007 Mazda CX-7
Crutchfield Customer Review (What's this?)

Easy installation

Pros:

Cons:

Perfect for '08 CX-9 w/ Bose

Andy from Westfield, IN on 1/29/2017

2008 Mazda CX-9
Crutchfield Customer Review (What's this?)

Very impressed. Integrated a Pioneer AVH-X3800BHS nicely with the Bose amp and steering wheel controls on my '08 CX-9. Has RCA plugs to connect directly to the head unit's pre-amp output, which was perfect for my configuration.

Pros:

Cons:

Easy to use

Brad from Annapolis, MD on 1/26/2017

2012 Mazda 5
Crutchfield Customer Review (What's this?)

I used this with a Pioneer 8200 NEX on a 2012 Mazda 5 (no Bose). Easy to use. Wires are color coded. Only had a couple issues with the included instructions. First since harness does NOT have both RCA and wire connectors for the speakers. I made the mistake of assuming this meant that everyone should use the RCA connectors. For the Pioneer RCA connectors require an amplifier. Thus I ended up having to cut the RCA connectors off (thanks Crutchfield tech support.) Secondly the blue and yellow wire off the steering control has contradictory instructions on two different pages in the book. On page one it indicated the wire was only for Kenwood and JVC. On page 2 it said that with exception to the listed special circumstances it should always be connect to the power antenna out put. Again thanks Crutchfield tech for informing that it is not used with Pioneer. The steering wheel controls worked perfectly after setting the dial to the correct number. I recommend this harness.

Pros: Works great once all is connected. Instructions are basically good.

Cons: Would be nice to have an instruction suggesting cutting the RCA connectors off if necessary. Also contradictory instructions on the use of the blue/yellow wire off the steering wheel control.

PAC RP4-MZ11 Wiring Interface

Anna from Massachusetts on 10/24/2016

2012 Mazda 3

Very easy to install. Directions could of been clearer but pretty simple.

Pros:

Cons:

I will give this product five star

M Mizanur from Sanford, Florida on 10/14/2016

2010 Mazda CX-9
Crutchfield Customer Review (What's this?)

I will give this product five star because of this one is plug and play. Really for my 2010 mazda cx 9 touring without boss system work perfectly. All of the buttons of steering wheel work as previously, overall I can adjust lcd panel clock from the steering wheel controller which is I think bonus. Installation is very easy by the instraction book. I will recommend this product to my friends and relatives. So much thanks also Crutchfield website to sale this type of real product and I also give five-stars too your best service.

Pros: Easy to install and work smoothly as previous.

Cons: Nothing to say

Terrific interface

Bruce from Cincinnati, OH on 9/19/2016

2010 Mazda CX-9
Crutchfield Customer Review (What's this?)

This system allows the after market head unit to integrate with the vehicle system, including the steering wheel controls. Clear directions on hooking up (after several calls to Crutchfield), and immediately initialized to match the vehicle. No programming needed. Very seamless. The changes in operation compared to the OEM system are clearly outlines in the instructions.

Pros: Seamless, worked immediately.

Cons: None.

Interface with a ton of features

Justin from Brunswick, ME on 7/31/2016

2007 Mazda CX-7
Crutchfield Customer Review (What's this?)

This interface solved all my problems and concerns with installing an aftermarket head unit and keeping the factory Bose amp. Steering wheel controls are preprogrammed and work like factory. Allows you to turn on Centerpoint, adjust level, adjust amp gain and fader. Plenty features.

Pros: Easy to install. Works flawlessly.

Cons: None.

Awesome!

M from Phoenix, AZ on 7/18/2016

2007 Mazda CX-7
Crutchfield Customer Review (What's this?)

Awesome! Everything went together perfect and easy!

Pros:

Cons:

Install Kit for 2012 Mazda 3 with Bose sound

JK from St Paul, MN on 6/6/2016

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

Good instructions - installation was easy and trouble free.

Pros: Easy, fast installation, good instructions

Cons: None

Easy to use

Brad from Champlin mn on 5/27/2016

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

Great product, very easy to use, alot easier then your typical wire harness you would normally use in a car.

Pros: Easy to use

Cons: None

OEM steering wheel and LED display

Dum L from Newtown, PA on 5/19/2016

2014 Mazda 5
Crutchfield Customer Review (What's this?)

Pretty much the only choice if you want to retain OEM dashboard display use and steering wheel controls with an aftermarket stereo. Such is the current state of aftermarket integration. The electronics are getting more sophisticated but this part makes it easier to handle. I've used older PAC units before that required programming and let me tell you it was not fun trying to read LED flashes and hoping it all works. This pre-programmed unit only required selecting the dial for manufacturer and making the requisite wire connections, much like you would do with any aftermarket wiring harness anyways. The documentation is a bit outdated and confusing to read. Using this with a Kenwood unit and the dash LED panel continues to work but remains on Audio; no more bluetooth, aux, xm, etc. which is just fine. The MPG info display works fine and is correctly mapped to the steering wheel info button. Volume up/down, skip forward/backward buttons work great and I think it's actually more responsive than the OEM which always had this weird lag. The mic button for hands free is somehow mapped to Attenuation on/off, no big deal since there is no handsfree system to speak of now. Things get a little weirder with the phone answer/end buttons. The answer button is only usable to pickup a call, pressing it by itself will not bring up the phone function by itself. No idea what the hang up button does as I was not able to get it to work to hang up a call. The unit can be reprogrammed manually.

Pros: easy hookup, pre-programmed for most buttons

Cons: odd mapping for Kenwood

Great product, but requires some extra work.

Sean from Portland, ME on 3/30/2016

2008 Mazda CX-7
Crutchfield Customer Review (What's this?)

The product works as it is intended and is a really nice part for my car. I love being able to use my steering wheel controls as they normally would. However, the dial that you are supposed to turn depending on your radio brand is very difficult to turn without a small flat-head screwdriver. Along with this there are extra plugs for the speaker + and - that have to be cut off to be wired to the radio. Other than this it is well worth the money to still be able to change my clock and use my steering wheel controls.

Pros: Works well Easy to understand Instructions are well written Allows me to change my clock and use steering wheel controls

Cons: Speaker wires have plugs that need to be cut off Dial is difficult to turn

Wiring Interface

SeanL from Dallas, Texas on 1/15/2016

Crutchfield Customer Review (What's this?)

This was my first time to install a car stereo. With this product and a bit of help from the Crutchfeild support it was pretty easy. This interface allowed me to keep most of the steering wheel functionality in my Mazda CX-9. I did not know that I could not use the factory microphone. Yes, the stereo I picked had an aftermarket mic, but it looks rough and it does not sound great. I really wish this product could integrate the factory mic as well.

Pros: Overall pretty easy to use.

Cons: Can't use factory Microphone.

Great Product!

DM from Massachusetts on 12/14/2015

2010 Mazda CX-9
Crutchfield Customer Review (What's this?)

I remember horror stories from my friends who used to work in Car Audio install about interfacing with existing components, steering wheel controls, etc. This made it a breeze! Contrary to what Crutchfield reported, ALL steering wheel features were retained, including the information display control.

Pros: Steering wheel button functionality retained, LCD info display still works, just differently. Interfaced my head unit with factory Bose system flawlessly.

Cons: None.

It Works

Top Jimi from Rhode Island on 8/14/2015

2010 Mazda 5
Crutchfield Customer Review (What's this?)

This product works as promised steering wheel controls do what they are meant to do.

Pros: Easy install!

Cons: none so far!!

Works well

Erie from California on 8/5/2015

2014 Mazda CX-5
Crutchfield Customer Review (What's this?)

Bought this PAC to go with the Kenwood DDX9902S. It works very well. First of all the picture is of an older version. The version I received actually has RCA plugs on the speaker wires which is a MAJOR PLUS! Everything works as expected, even the steering wheel control on my 2014 Mazda CX-5. If you want to do more advance programming of the steering wheel controls, it requires you to access the PAC and push a button on it and watching the light on it blink. The instructions for programming weren't very clear, I had to do some reading elsewhere to figure it out. Downside of this is that if you decide to change steering wheel controls you have to pull out your head unit to access the PAC.

Pros: RCA plugs on it, steering wheel controls programmable.

Cons: Manual configuration that requires taking head unit out, programming it is difficult.

Works great in my Mazda5

JFun from Georgia on 7/11/2015

Crutchfield Customer Review (What's this?)

This adapter worked perfectly with my Mazda5. I did have to cut off the RCA connectors (as other reviewers have noted) but that was no big deal. I thought about installing female RCA's on my existing wiring but decided not to. It would be really great if the volume was displayed on my car's display as well as the radio but I understand that's not as simple as it sounds. It just says "Audio" and then "volume" or the mode when you change them. Does exactly what I expected it to.

Pros: Works great with my car

Cons: A little pricey

Good product for Mazda

Mazda 5 install from Sacramento, CA on 6/14/2015

2012 Mazda 5
Crutchfield Customer Review (What's this?)

This fit the bill for install into my Mazda 5. It was fairly simple to install. although having to cut off the rca connectors to link to the Pioneer wiring harness was a bit of an annoyance. The steering wheel integration works well. I just wished there was a way to integrate the bluetooth answer/hang up into the steering wheel controls.

Pros: worked as described

Cons: none yet

It works

speed from Missouri on 4/20/2015

Crutchfield Customer Review (What's this?)

I used this kit on a 2010 Mazda 6 I Touring and everything works.

Pros: Ability to keep steering wheel controls plus the LCD display from the old system.

Cons:

Great!

Wiiland from Michigan on 4/16/2015

2010 Mazda 5
Crutchfield Customer Review (What's this?)

Makes wiring easier and it's great to retain steering wheel controls. Wish they gave you a little more cord so that you could mount the box in the glove compartment since you have to press a button on it to reprogram any of the functions. Also, mine came with RCA plugs for a pre-amp already installed, but this wasn't reflected in the directions. I had to call in for support and then cut off the RCAs to wire to the speakers and everything worked fine.

Pros: Easy to use

Cons: Outdated instructions

EASY

Fire Proof from Missouri on 1/29/2015

2009 Mazda 6
Crutchfield Customer Review (What's this?)

I installed this SWC interface with a Kenwood DPX500BT head unit in my 2009 Mazda 6. After a few self-inflicted issues it went in without a single problem. The interface actually increased my control over the message center. I can now put messages and reminders up on the dash where I can't forget them. The installation was even easier than the one I did on my Bride's vehicle a few years ago. Truly Plug and Play. Read through ALL the directions; sometimes they're a little vague.

Pros: Simple to wire and easy to use. All my factory functions work perfectly.

Cons: I have no cons for this.

Works as expected

nolig from Florida on 1/8/2015

2011 Mazda 6
Crutchfield Customer Review (What's this?)

Pretty easy to connect and configure. Just about every wire color matched and the instructions explain the blue wires. My clock and steering wheel controls work.

Pros: Works great. Easy setup.

Cons: none

Nice

Eric from Augusta, GA on 1/6/2015

2012 Mazda 6
Crutchfield Customer Review (What's this?)

Works as advertised. Installation at shop took more time than normal since he was unfamiliar with the product. However, once done controls work great and retained ability to change car clock. Can add multiple commands to SWC. Though chose not to use this feature.

Pros: Works great.

Cons:

Easy installation, great directions

Joel from Old Bridge, NJ on 12/8/2014

2010 Mazda 3
Crutchfield Customer Review (What's this?)

Easy install thanks to great, detailed instructions. As always, a great product provided by a great audio retailer.

Pros: Detailed, clear installation instructions

Cons: None

PAC RP4-MZ11

Mazda CX-9 from CA on 9/9/2014

2010 Mazda CX-9
Crutchfield Customer Review (What's this?)

This is a great product. Lets you keep your SWC and also the display info. From the different forums, I could not figure if I would still be able to use my gas mileage gizmo and reset it. So for anybody who wants to know-yes you can.

Pros: Makes the wiring and installation very easy. No need to tap in the car for reverse and parking brake wires (I also installed a rearview camera).

Cons: Some wires are extra and it took a few calls to tech support to be sure I am connecting them right.

Happy wife

Ron from Pueblo, CO on 4/28/2014

2010 Mazda 6
Crutchfield Customer Review (What's this?)

My wife wanted to keep her steering controls so she got them!

Pros: Happy wife

Cons: Dissatisfied wife

SWC Perfection

Scott M from Berwick, ME on 3/10/2014

Crutchfield Customer Review (What's this?)

This SWC adapter works great. It is pre-programmed, which makes it plug and play ready. I really like the customizable programs,. The instructions were straightforward and precise. I highly recommend this adapter to those looking to install in a Mazda or a Honda.

Pros: Slick Slick Slick install

Cons: Non that I can think of.

Steering wheel control more functional than before

AndyC from Philadelphia, PA on 1/22/2014

2008 Mazda CX-7
Crutchfield Customer Review (What's this?)

Works great with my 08 Mazda CX7. I had to do some of the optional program as the out of the box programming left a little bit to be desired. But after a couple of attempts, the steering wheel controls do everything they did with the factory unit and more. It also allows me to easily adjust the separate LCD display that was controlled by the original factory head unit.

Pros: Easy to program

Cons: Lots of extra wires depending on installation

Great adapter

Ames from Killeen, TX on 1/19/2014

2009 Mazda 6
Crutchfield Customer Review (What's this?)

This steering wheel control adapter works very well. It is pre-programed, so it is basically plug and play. You can also add custom programs if you need to. Instructions are very clear, but I misunderstood one step. I called in and talked to tech support. There was no wait time and the technician helped me solve my problem right away. I would recommend this adapter to anyone with a Mazda. It works very well for me.

Pros: Easy to install, maintains factory functions.

Cons: I lost the factory auxiliary input to my stereo. It seems like this should be an easy fix, especially since my new head unit has an auxiliary input.

PAC RP4-MZ11 Wiring Interface

Anonymous from Salinas ca on 11/15/2013

Crutchfield Customer Review (What's this?)

Steering wheel control Does not control stereo like the factory stereo.

Pros:

Cons:

A disappointment

Joshua C. from Blue ridge, GA on 9/8/2013

2009 Mazda CX-7
Crutchfield Customer Review (What's this?)

Had to send back the first one because the swi died in less than 24 hours after install. The new one seems to be working fine, but the controls are a wee bit sluggish and sometimes don't work at all...I don't think I'd use this brand again but it is fine for now.

Pros: Mostly does what it says, price, convenience of the bundle

Cons: Sluggish, possible reliability issues (can't truly judge based off the first one) , manual control setup.

PAC RP4-MZ11 Factory Integration Adapter review

JoeR from Frederick, MD on 8/10/2013

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

Product works great, wiring was relatively easy, especially with Crutchfield phone assistence

Pros: Integrates car controls with new head unit

Cons:

Not for the Beginner

Mark from Wisconsin on 7/8/2013

2010 Mazda 6
Crutchfield Customer Review (What's this?)

Let me first say this product [probably isn't for the first time installer. I am not a first time installer and was able to get it wired and working without issue. This was the perfect solution to allow me to keep my steering wheel controls working. It did take a couple resets to get the controls functioning correctly. I found the easiest way to reset everything is to just disconnect the negative side of the battery and let the car sit for a bit. Reconnect and the adapter was functioning correctly.

Pros: Allowed me to keep my factory steering wheel functions

Cons: Ease of install, not recommended for a beginner Price

First try was a disappointment!

Anonymous from San Bernardino, CA on 5/17/2013

Crutchfield Customer Review (What's this?)

Did not work! A second unit is being shipped.

Pros: Color coded for easy install. Clear instructions!

Cons: It didn't work with the steering wheel controls. It will be replaced, but I believe an item this expensive should work the first time. It does not come with any connectors. You have to strip the wires / cables and buy the connectors or use black tape to connect it to your receiver.

Details

Hands-on research

Product Research

Features

Radio Replacement Interface (for Mazda): The PAC RadioPRO 4 Radio Replacement Interface (RP4-MZ11) allows the replacement of the original factory radio in select Mazda vehicles with an upgraded aftermarket head unit. It has been engineered to interface seamlessly with the automobile's computer data bus system, as well as retain important safety and convenience features; such as:

  • Factory amplified audio system (including Bose)
  • Steering wheel controls (SWC)
  • Factory message display
  • Rear seat entertainment (RSE)
  • Navigation based outputs (including vehicle speed sensor, parking brake, & reverse)
  • Accessory 12-volt output
  • Warning chimes
Note: Premium factory amplified systems fader must be adjusted through the RP interface.

Vehicle Compatibility: The RadioPRO 4 (RP4-MZ11) is compatible with select 2006-2013 Mazda vehicles with factory CAN databus radios. Compatible vehicles as of 3/12/2013 include:

Make Model Year
M
A
Z
D
A
2 Series 2011-2012
3 Series 2008-2012
5 Series 2010-2012
6 Series 2009-2012
CX-5 2013
CX-7 2007-2012
CX-9 2007-2012
MX-5 Miata 2006-2012
RX8 2009-2011
Note:
  • If using this interface in a Mazda CX-5, all vehicle settings must be finalized before removing the factory radio.
  • The following vehicles (RX-8, 2007-2009 CX-9 w/non-nav radio, Miata) will not provide a VSS signal as this information is not on the data bus.
  • The following vehicles (RX8, 2007-2009 CX7, 2010 Mazda 5/Miata) will not provide a reverse output as this information is not on the data bus.
  • The following vehicles (RX-8, Miata) will not provide a parking brake output as this information is not on the data bus.
  • The following vehicles (2007-2009 CX-9, 2007-2009 CX-7) have a speed based parking brake wire that will provide a negative trigger until the vehicle is going at least 4 mph.

SWC Compatible: The interface comes pre-programmed for all of the vehicle's factory SWC functions and does not require programming, unless you wish to re-assign the SWC functions to different buttons. The SWC functions can be easily programmed; see control settings and functions below.  The interface retains programming even if your vehicle's battery is disconnected.

Switch Position 1 2 3 4 5 7
Radio Alpine JVC Kenwood Clarion Valor Dual Pioneer Sony
Control Functions Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/-
Mute Mute Mute Mute Mute Mute Mute Mute
Source Source Source Source Source Source Source Source
Preset +/- Track +/- Play Search +/- Track +/- Preset +/- Preset +/- Preset +/-
Track +/- Band/Disc + Track +/- Band Cursor up/down Track +/- Track +/- Track +/-
Power Preset/Disc - Disc/FM + Send OK Band Band Band
Play/Enter Select Disc/AM - End *** *** Phone Menu ***
Band/Program Attenuation Answer *** *** *** Answer Call ***
Receive (phone) Phone Receive/Reject *** *** *** *** End Call ***
End Voice Dial *** *** *** *** Voice Activation ***
*** Power *** *** *** *** *** ***
Note: The SWC harness contains a Blue/Yellow wire and a 3.5mm connector. You will only use one of the connectors, based on your type of aftermarket radio. The Blue/Yellow wire supports Kenwood, Newer JVC, OEM and Blaupunkt radios. The 3.5mm jack supports Alpine, Jensen, Older JVC, Clarion, Pioneer, Sony, Valor, and Dual radios. Not compatible with Soundstream head units.

OEM LCD Compatible: The PAC RadioPRO 4 Interface (RP4-MZ11) retains the vehicle's OEM LCD, so you can still access your vehicle settings. To access the vehicle setting menu, press and hold the Mode button on the SWC until "Setup Menu" is displayed on the LCD screen. Use the Arrow Down on the SWC to scroll through the options. Once the option you wish to select is displayed, press the Mode button on the SWC to advance to the next step.

  • Change Text: Allows you to enter custom text for the LCD screen's default display. Once this is selected, you can use the Volume Up & Down buttons to select the character position and the Arrow Up & Down buttons to select the character. Once you have set your custom text, do not press any buttons for 8 seconds and the programming function will time out and return to the default display.
  • Set Clock: Allows you to set the clock on the LCD screen. Once this is selected you can use the Arrow Down button on the SWC to choose a clock set mode. Once your mode is displayed, press the Mode button on the SWC to select. Follow the instructions on the LCD screen to set the clock.
  • Display Info: Allows you to change vehicle info display such as MPG, miles to empty, etc. Once this is selected, follow the instructions on the LCD screen to change the vehicle info display. Once on the desired display, do not press any buttons for 8 seconds and the programming function will time out and return to the default display.
  • User Options: Allows you to turn off SWC text or reset options to default. SWC text shows you on the LCD screen which button you are pressing on the SWC. Resetting options to default will set the custom text back to audio and if equipped, set the Bose amp settings back to zero. Once this is selected you can use the Arrow Down & Up buttons on the SWC to scroll between SWC Text or Reset. To select either of these press the Mode button. Follow the instructions on the LCD screen for each individual selection.
  • Amp Settings: Allows you to turn Center Point off/on (when available). Allows you to adjust Center Point gain, fader and amp gain, This feature will only be seen on 2007+ CX-7 & CX-9.
  • Exit: Allows you to exit the menu and return to the default display.

Rear Seat Entertainment: The RP4-MZ11 will allow the original factory DVD player and rear screen to function independently from the newly installed aftermarket radio. A/V will be passed  from the factory DVD player to the rear screen and audio can be heard through the headphones. A/V cannot be passed from the factory DVD player to the aftermarket head unit.

Radio Select Switch: The radio select rotary switch on the side of the interface must be adjusted to the proper radio setting before plugging the interface into the vehicle.

# Dial Radio Manufacture
1 Alpine
2 JVC
3 Kenwood
4 Clarion
5 Valor
6 OEM
7 Dual, Pioneer, Sony
8 Blaupunkt

Wiring Connection Chart:

Wiring Harness
Wire Color Function
Yellow +12V Battery
Red Accessory Output (1A)
Black Ground
Orange/white Illumination
Orange/white Illumination
Blue/white Amp Turn On Input
Blue Power Antenna/2nd SWC Out
Green/white 2nd SWC Input
Green Reverse Output (+)
Red/White Parking Brake Output (-)
Purple/white VSS Output
White RCA Left Front Speaker
Grey RCA Right Front Speaker
Green RCA Left Rear Speaker
Purple RCA Right Rear Speaker

Firmware Updates: The RP4-MZ11 can be updated with new firmware as it becomes available using the PAC-UP interface updater (sold seperatly). Please visit www.pac-audio.com/firmware for available updates.

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?

Part of the wiring harness shorted out and won't send power to stereo or steering wheel controls, I was able to get stereo working by by-passing the device, but have no steering wheel controls, unit was around 2 years old or so. I guess they don't make stuff like they used to. [ Clinton  Oct 18, 2017 ]
Because I want to retain my SWCs and this seemed like the best option. [ Richard  Aug 13, 2017 ]
Mazda installation [ Mark  Jun 22, 2017 ]
Necessary to make the in dash display work properly [ O  May 18, 2017 ]
It kept my steering wheel controls easily. The instructions for programming the unit can be confusing, but as soon as you plug it into your car, it knows where it is and it was able to set itself up. [ Anders  May 16, 2017 ]
I want to keep my steering wheel controls [ Sharon  May 02, 2017 ]
I want to retain all of the steering wheel controls and the factory warning sounds [ Matthew  Apr 01, 2017 ]
Came with recommended parts. [ MILTON  Feb 18, 2017 ]
To retain the factory steering wheet controls. [ Robert  Jan 27, 2017 ]
I would like to retain the steering wheel controls and this is what was recommended. [ Kenneth  Jan 24, 2017 ]
Looks like the perfect item to keep my car as close to factory and not lose my LED screen . [ Patrick  Dec 09, 2016 ]
** Warning anyone trying to use adapter on 2008 Mazda CX-9 with Grand Touring Package and BOSE (non-DVD) factory system: It took the Crutchfield tech team and I several attempts to find the correct adapter and then we had to cut the factory in dash control wires for the top of dash display (Shows AC controls,etc for factory radio) b/c the steering wheel controls would do erratic things like, switch input sources , or eject the DVD when trying to skip to the nextchapter. . [ PATRICK  Dec 01, 2016 ]
needed to install unit for customer and she wanted steering wheel controls too work [ KARLSON  Jun 16, 2016 ]
need to maintain steering wheel controls [ Micheal  May 01, 2016 ]
Interface my Pioneer DEH-X9600bhs with my factory system to keep LCD display and Steering Wheel controls [ ROBERT  Apr 18, 2016 ]
is the best [ jorge  Mar 11, 2016 ]
to connect a aftermarket receiver to my mazda5 factory wiring and SWCs. [ Robert  Mar 08, 2016 ]
I want to retain my steering wheel controls with this audio upgrade. My adviser, Ozzy, said this was how to accomplish. Ozzy's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=110 [ David  Feb 13, 2016 ]
Would like to minimize installation time, and retain as many of the original interface features as possible. [ Michael  Dec 17, 2015 ]
Christmas gift [ Debbie  Dec 03, 2015 ]

11 questions already asked

Sorry but I only had the stereo installed for about a month before I got a new car...I don't have the answer that you're looking for and I no longer have the car to check for you...sorry :-( [ Rebecca  Apr 12, 2016 ]
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/. [ Krissy  Mar 29, 2016 ]  Staff
You can check to see if this will fit your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional 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. [ Kenny  Feb 24, 2016 ]  Staff
You can check to see if this will fit your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional 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  Feb 24, 2016 ]  Staff
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  Nov 23, 2015 ]  Staff
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  Nov 23, 2015 ]  Staff
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  Jul 03, 2015 ]  Staff
The ability to retain steering wheel controls with aftermarket receivers will be determined by the receiver you are using and the vehicle you have. For full information on this type of integration (including the parts you will need) please contact an Advisor by phone (1-800-324-9695) or online chat. [ Krissy  Nov 21, 2014 ]  Staff
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  May 26, 2014 ]  Staff
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you. [ Jeff  Feb 12, 2014 ]  Staff
According to the documentation I read, no. If you are more knowledgable about the wiriing of the phone, it may be possible, but I could not determine a way. [ JOE  Jan 19, 2014 ]
As long as the head unit you are using is capable of voice functionality, the answer is "YES" [ JOSE  Jan 19, 2014 ]
It would come down to the head unit. My aftermarket head unit had a separate microphone for answering calls The harness works great however [ JEREMY M  Jan 19, 2014 ]
I own a Kenwood DNX-9980HD and used the supplied Mic in my install. I removed the factory Mic and ran the new one to that location and mounted it there. You can't even notice that it has been swapped. Not sure if OEM Mic worked or not never tried hope that helps some. [ NICHOLAS F  Jan 19, 2014 ]
The original microphone cannot be used with an aftermarket system. The microphone that comes with an aftermarket system is designed for that stereo mostly. There is no harness adapter to enable the use of the original mic. I would not recommend using the factory mic with an aftermarket stereo system. It may cause audio problems for the user on the other end of the line. [ RODOLFO A  Jan 19, 2014 ]
Articles

Searches related to the PAC RP4-MZ11 Wiring Interface Connect a new stereo and retain steering wheel audio controls, entertainment system, safety warning chimes, and factory amp in select 2008-up Mazdas

PAC