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

Item #: 541RP4MZ11

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11 Reviews | 4 questions - 8 answers

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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, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research

What's in the box?

Download owner's manual

  • 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

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, 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:

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

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PAC RP4-MZ11 Wiring Interface Reviews

Average Customer Review:

11 reviews
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Easy installation, great directions

Written By Joel, Old Bridge, NJ on Monday, December 08, 2014

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

Written By Mazda CX-9, CA on Tuesday, September 09, 2014

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

Written By Ron, Pueblo, CO on Monday, April 28, 2014

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

Written By Scott M, Berwick, ME on Monday, March 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

Written By AndyC, Philadelphia, PA on Wednesday, January 22, 2014

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

Written By Ames, Killeen, TX on Sunday, January 19, 2014

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

Written By Anonymous, Salinas ca on Friday, November 15, 2013

Crutchfield Customer Review (What's this?)

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

A disappointment

Written By Joshua C., Blue ridge, GA on Sunday, September 08, 2013

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

Written By JoeR, Frederick, MD on Saturday, August 10, 2013

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

Not for the Beginner

Written By Mark, Wisconsin on Monday, July 08, 2013

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!

Written By Anonymous, San Bernardino, CA on Friday, May 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.

Questions & Answers Ask the community. Share your knowledge.

4 questions already asked

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 ]

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