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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

PAC's RP4-MZ11 radio replacement interface lets you replace the factory radio in select 2008-up Mazdas.

Read more from Crutchfield writer, Jon P.

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About 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.

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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

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More details on the PAC RP4-MZ11 Wiring Interface

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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.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Needed this harness to make the connection easier. [ Mark  Mar 04, 2019 ]
A
Would like to retain the factory components came with my 2008 Mazda CX-9 with full Bose Entertainment and Navigation, backup camera system that's already integrated. [ Taren  Jan 27, 2019 ]
A
To keep factory wheel controls [ STEVE  Nov 27, 2018 ]
A
It was recommended. [ Richard  Sep 20, 2018 ]
A
It was recommended. [ Richard  Sep 18, 2018 ]
A
This is supposed to keep my Bose speakers as well as steering wheel control. Fingers crossed. [ Michael Jude  Aug 17, 2018 ]
A
To maintain steering wheel controls. [ Alan  May 21, 2018 ]
A
I used this to retain steering wheel controls and factory LED usage. [ Ryan  Feb 25, 2018 ]
A
i was looking for an alternate option as this added $63 to the cost of my order. I was disappointed but understood. [ James  Dec 03, 2017 ]
A
To aid in istall. Highly recomended [ ERIC  Nov 20, 2017 ]
A
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 ]
A
Because I want to retain my SWCs and this seemed like the best option. [ Richard  Aug 13, 2017 ]
A
Mazda installation [ Mark  Jun 22, 2017 ]
A
Necessary to make the in dash display work properly [ O  May 18, 2017 ]
A
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 ]
A
I want to keep my steering wheel controls [ Sharon  May 02, 2017 ]
A
I want to retain all of the steering wheel controls and the factory warning sounds [ Matthew  Apr 01, 2017 ]
A
Came with recommended parts. [ MILTON  Feb 18, 2017 ]
A
To retain the factory steering wheet controls. [ Robert  Jan 27, 2017 ]
A
I would like to retain the steering wheel controls and this is what was recommended. [ Kenneth  Jan 24, 2017 ]
A
Looks like the perfect item to keep my car as close to factory and not lose my LED screen . [ Patrick  Dec 09, 2016 ]
A
** 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 ]
A
needed to install unit for customer and she wanted steering wheel controls too work [ KARLSON  Jun 16, 2016 ]
A
need to maintain steering wheel controls [ Micheal  May 01, 2016 ]
A
Interface my Pioneer DEH-X9600bhs with my factory system to keep LCD display and Steering Wheel controls [ ROBERT  Apr 18, 2016 ]
A
is the best [ jorge  Mar 11, 2016 ]
A
to connect a aftermarket receiver to my mazda5 factory wiring and SWCs. [ Robert  Mar 08, 2016 ]
A
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 ]
A
Would like to minimize installation time, and retain as many of the original interface features as possible. [ Michael  Dec 17, 2015 ]
A
Christmas gift [ Debbie  Dec 03, 2015 ]
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16 questions already asked

Q
I have a 2008 mazda 3 with manual ac controls no bose and 6 speakers and want to keep the lcd display above my radio to still work along with the clock and temp will this do that? I have been told both yes and no
[ Eric  Feb 25, 2019 ]
1 answer
A
This interface will retain the vehicle's OEM LCD, so you can still access your vehicle settings and set the clock. I don't have anything specifically listing the temp display, but I don't expect it to stop working. It will not send any information from the new radio to it My Bio: https://www.crutchfield.com/bio/Paul
[ Paul  Feb 27, 2019 ]  Staff
Q
Does this allow using the commander knob in the center console of a 2014 Mazda 6?
[ Eric  Jul 01, 2018 ]
2 answers
A
I don't know I have a 2011 with a former Bose system and all my steering wheel controls work with the interface
[ HERBERT  Jul 01, 2018 ]
A
I'd assume so but I don't have a 6 so I can't confirm 100%, got a 2011 Mazdaspeed 3 and it was a direct plug and play. But my car didn't have a commander knob since everything was in the factory head unit
[ Cezary  Jul 01, 2018 ]
Q
My aftermarket stereo does not use a dimmer wire on the stereo harness but it does use the 3.5mm input from this adaptor. The adaptor has a dimmer wire on the vehicle harness and a dimmer wire on the adaptor harness. The instructions make no mention of connecting these together and they are not connected from the factory. Am I supposed to connect the vehicle dimmer wire to the adaptor dimmer wire?
[ William  Jun 02, 2018 ]
1 answer
A
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.
[ Krissy  Jun 08, 2018 ]  Staff
Q
are there any better instructions on how to connect all the wires to a the stereo its self?
[ sarah  Apr 28, 2018 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through any installation and/or wiring questions in more detail. 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 support directly for more assistance.
[ Larry  May 08, 2018 ]  Staff
Q
What does this mean? "Premium factory amplified systems fader must be adjusted through the RP interface."
[ Daniel  Oct 30, 2017 ]
1 answer
A
In compatible vehicles with the premium factory sound system (commonly Bose), you will be able to adjust the fader control (front to rear level adjustment) using the integration harness. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service: https://www.crutchfield.com/support/ContactUs.aspx
[ Ryan  Nov 03, 2017 ]  Staff
Q
Do all of the Mazda center console buttons next to the parking break work with this? What about the knob to switch inputs? Which don't work?
[ Jonathan  Apr 12, 2016 ]
1 answer
A
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 ]
Q
My stereo produces a hiss at even the lowest level volume. The beeps from it are obnoxiously loud. I have a car with a Bose system from the factory. Do I need to take the pre-amp outputs from my new head unit and splice them together with the harnesses speaker connections?
[ Kyle  Mar 27, 2016 ]
1 answer
A
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
Q
Will this work with a 2014 Mazda 6 I Grand Touring 11 Speaker premium Bose System. Im installing a Pioneer AVH-X3800 Double Din Radio?
[ Vince  Feb 24, 2016 ]
1 answer
A
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
Q
Hi I would like to know if this will work with a 2014 Mazda 6 I Grand Touring 11 Speaker premium Bose System Im installing a Pioneer AVH-X3800 Double Din Radio?
[ Vince  Feb 24, 2016 ]
1 answer
A
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
Q
I am installing a pioneer AVH 5700 double din in a 2010 Rx8 R3.... if I buy the PAC RP4-MZ11 will I need any other wiring harness? I don't want to splice into my stock harness... I want everything to be simple.... plug and play.
[ Gabriel  Nov 21, 2015 ]
1 answer
A
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
Q
I am installing a pioneer AVH 5700 double din in a 2010 Rx8 R3.... if I buy the PAC RP4-MZ11 will I need any other wiring harness? I don't want to splice into my stock harness... I want everything to be simple.... plug and play.
[ Gabriel  Nov 20, 2015 ]
1 answer
A
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
Q
The details of this product stops at 2012, but your site says a 2015 Mazda 5 is compatible. Can you confirm?
[ Michael  Jul 02, 2015 ]
1 answer
A
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
Q
What about the steering wheel phone controls? They're not mentioned in the features list. Make call, hangup, voice access to phonebook. Will these still work on a CX5?
[ Mike  Nov 20, 2014 ]
1 answer
A
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
Q
I have a 2008 mazda cx7 with factory bose. This will keep my swc and bose amp. But I'm confused on one thing. Will I need another harness? It looks like the large red harness on this would connect to the car and the bare wires go to the aftermarket head unit. Am I correct? There would be nowhere else to put another metra/scosche harness.
[ Andrew  May 25, 2014 ]
1 answer
A
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
Q
I have a 2010 Mazda 5. From what I understand, this adapter allows me to use the factory LCD for climate control and temp/time. Will an aftermarket radio's data be displayed in the factory LCD in the dash?
[ Cory  Feb 12, 2014 ]
1 answer
A
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
Q
can i still use the built in microphone to answer calls or is there another harness for that feature to work?
[ garnet  Jan 18, 2014 ]
5 answers
A
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 ]
A
As long as the head unit you are using is capable of voice functionality, the answer is "YES"
[ JOSE  Jan 19, 2014 ]
A
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 ]
A
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 ]
A
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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