Contact us
Close contact box

Metra 70-7903 Receiver Wiring Harness

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

Item # 120707903

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

Find what Fits your car

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

Item # 120707903

In Stock
C$19.99
Add to wishlist

About the Metra 70-7903 Receiver Wiring Harness

Metra 70-7903 wiring harness

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 +/-
READ LESS

Customer reviews

Loading reviews...

Metra 70-7903 Receiver Wiring Harness Reviews

Average Customer Review(s):

Verified customer (What's this?)
Verified employee purchase (What's this?)

Pros:

Cons:

Crutchfield response

More details on the Metra 70-7903 Receiver Wiring Harness

Stacey B.

Product Research

Features

Metra Wiring Harness: Metra 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 Metra 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 Metra 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 Metra 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 Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Chassis Ground
Blue Power Antenna
Blue/white Amp Turn-On
Orange Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -

Loading accessories...

Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Suggested purchase for installing new stereo unit. [ Kathleen  Feb 16, 2019 ]
A
Nice [ Aa  Feb 14, 2019 ]
A
you need it unless you're some kind of electrician rigging up his own stuff [ John  Feb 07, 2019 ]
A
All connections are included with your car stereo purchase. I love this about ordering from crutchfield [ Jose  Feb 06, 2019 ]
A
uhhh I said I needed it? [ greg  Jan 13, 2019 ]
A
I forgot to before...and I'm really not up to hacking up the factory wiring and having to figure out what goes where...I might be able to pull it off, but more likely my brain would probably implode first!.. [ Richard  Dec 24, 2018 ]
A
This product was recommended by my son, who also owns a Mazda Miata. [ Jere  Dec 20, 2018 ]
A
Recommended [ Jeramy  Dec 20, 2018 ]
A
recommended [ RANDALL S  Dec 18, 2018 ]
A
Makes installation easier. [ Matthew  Dec 13, 2018 ]
A
My husband asked me to! :o) [ Patricia  Dec 13, 2018 ]
A
Looked like a good value. Features vs. Cost. [ Jim  Nov 26, 2018 ]
A
...i needed it? [ Craig  Nov 22, 2018 ]
A
Required/free [ Chester  Nov 18, 2018 ]
A
This is necessary for wiring the new stereo. [ William  Nov 03, 2018 ]
A
Excellent service to simplify the installation process. [ Stephen  Oct 15, 2018 ]
A
Didn't know if the auto parts store near me had the right one, but crutchfield let me know that this fits in my car [ Caleb  Oct 05, 2018 ]
A
I wanted to get everything I needed all in one place. [ Ashley  Oct 04, 2018 ]
A
This was in my basket as I purchased a pioneer head unit for my sister's Mazda5 that is exactly like in her Equinox previously purchased here on your site. I found the faceplate elsewhere but need the wiring harness and wheel control kit for her vehicle. I do not remember my customer service helper's name from the previous purchase here but he was extremely helpful and I just had to wait for my budget to meet the pricing you have here.. Thanks for including the wiring diagrams. [ Marty  Sep 21, 2018 ]
A
for easy and seamless installation [ Chris  Sep 15, 2018 ]
A
This was recommended to me by the Crutchfields tools/tips, I would not have even known to purchase this otherwise (in turn I would not be able to install the unit I had purchased, thank you for saving me the headache of learning that the hard way). [ Matthew  Sep 03, 2018 ]
A
Worked like a charm. Doing its job just fine... [ Peter  Sep 02, 2018 ]
A
I was told that I needed it. I hope they were correct. [ Lj  Aug 17, 2018 ]
A
To simplify the wire connections. [ James  Aug 07, 2018 ]
A
Ease of installation hopefully [ douglas  Aug 06, 2018 ]
A
free [ Gregg  Aug 04, 2018 ]
A
I have ordered two previous radios from Crutchfield and did the wiring myself. Although Crutchfield does a nice job on the instructions, the wire color-coding can still be confusing. Why face the hassle! Crutchfield can do it right and much neater than I can. [ Fred  Aug 02, 2018 ]
A
has used this brand before have never had a issue [ charles  Jul 31, 2018 ]
A
Great price! [ kelly  Jul 29, 2018 ]
A
Should fit. [ Steven  Jul 23, 2018 ]
A
Hook up is sure and connections are correct [ KEVIN  Jul 15, 2018 ]
A
I want to transfer my car stereo from my Nissan pick up to my Mazda Tribute. [ Scott  Jun 25, 2018 ]
A
Didn't want to cut into the OEM harness AND it makes installation a LOOOOOT easier. [ Brett  Jun 17, 2018 ]
A
To make installation easier. [ Robert  Jun 06, 2018 ]
A
To ease the installation of the Stereo [ Sam  May 22, 2018 ]
A
This was part of the installation items included with my purchase. [ Jeffrey  May 17, 2018 ]
A
auto-selected [ Joseph Adam  May 14, 2018 ]
A
I need it to make installation easier ! [ JEFF  May 06, 2018 ]
A
So that the auto connections are simple. [ Kevin  Apr 12, 2018 ]
A
recommended [ G  Apr 05, 2018 ]
A
Not to sure about trying to wire up a new HU by hand, plug and play is the way to go [ Shawn  Apr 04, 2018 ]
A
It makes it much simpler to install is I don't have to waste my weekend trying to figure out the correct color coding for the radio, I wanted to just plug and play. [ Eddy  Mar 26, 2018 ]
A
need this for installation [ bruce  Mar 19, 2018 ]
A
Came with kit [ John  Mar 15, 2018 ]
A
This are the key to making the install go smoothly. [ Jim  Mar 11, 2018 ]
A
I needed it [ Thomas  Mar 11, 2018 ]
A
It is what I needed [ SHERA  Mar 02, 2018 ]
A
recommended [ Janelle  Feb 16, 2018 ]
A
fits my car [ Tyler  Feb 15, 2018 ]
A
so that I do not damage factory harness for resale if I ever sell car. [ James  Jan 28, 2018 ]
A
Don't cut into the factory harness! These adapters are convenient. [ Thomas  Jan 25, 2018 ]
A
It was free with the stereo. [ Andrea  Dec 10, 2017 ]
A
Crutchfield recommended for easy install (which is what I want) [ Damon  Dec 08, 2017 ]
A
I have had good luck with the recommended harness that crutchfield suggested on my last 2 vehicles [ David  Nov 18, 2017 ]
A
Good product [ Gustavo  Nov 11, 2017 ]
A
I was told by Crutchfield that this would be needed to install my nav system in my particular car. Very helpful because I never would have known that until I received my purchase. Now I can install it as soon as possible! [ RETRODOG  Nov 07, 2017 ]
A
save time and aggrivation [ James  Oct 26, 2017 ]
A
under impression it was needed? [ DARRIN  Oct 19, 2017 ]
A
Recommended harness for my Kenwood stereo. [ David  Oct 01, 2017 ]
A
When installing you new stereo use the harness or you will regret it after the first wire!! [ John  Sep 22, 2017 ]
A
It is the harness needed for the car. [ Anthony  Aug 28, 2017 ]
A
Required for installation. [ Brian  Aug 10, 2017 ]
A
Clean hookup [ Robert  Aug 03, 2017 ]
A
Came complimentary with the purchase of the receiver. Love Crutchfield... [ Eric  Jul 30, 2017 ]
A
Easy hook up and disconnect. [ Mike Nas  Jul 22, 2017 ]
A
Ease of use [ Chris  Jul 20, 2017 ]
A
much much easier than cutting wires [ STEVEN  Jul 16, 2017 ]
A
Easy compatibility between receiver and factory wiring...and it was free! [ Bryan  Jun 18, 2017 ]
A
To install a new stereo in my miata [ Brad  Jun 13, 2017 ]
A
I want to continue using my steering wheel controls with my aftermarket car stereo. [ Robert  Jun 03, 2017 ]
A
to complete instlation of gift radio [ carmabn body  May 30, 2017 ]
A
Ease of install [ Rodger  May 24, 2017 ]
A
Fits 2002 Mazda Protege Sedan [ Hongbiao  May 21, 2017 ]
A
the harness makes the installation easier. [ Peter  May 19, 2017 ]
A
Super simple, just connect the colors, plug it in. [ Anders  May 16, 2017 ]
A
Easy install [ Chase  May 15, 2017 ]
A
My car was broken into and it was torn out [ Aislinn  May 04, 2017 ]
A
Need this for new stereo [ KRISTI J  May 03, 2017 ]
A
This was the recommended compatible kit for my 2014 Mazda 6. [ Keith  Apr 28, 2017 ]
A
It was a direct fit for my vehicle, and name brand at a good price. [ Andrew  Apr 25, 2017 ]
A
Needed for my 2014 Mazda 6 Pioneer install [ David  Apr 13, 2017 ]
A
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 ]
A
To make installation easier [ V  Apr 01, 2017 ]
A
Because it makes install easy and clean with no modifications to the factory wiring [ Michael  Mar 24, 2017 ]
A
To ease the installation of a new receiver in my 2010 MX-5. [ Britt  Mar 19, 2017 ]
A
need [ Debbie  Mar 15, 2017 ]
A
ease of ordering [ eddie  Mar 15, 2017 ]
A
Because you cannot connect the radio without it! [ Timothy  Mar 14, 2017 ]
A
Needed [ Brad  Mar 01, 2017 ]
A
It was suggested on the web page, and with my other crutchfield orders it has made installation so much simpler! [ Michael  Feb 08, 2017 ]
A
makes installing the system a snap. Why would you not get the right parts the first time! [ Gary  Jan 25, 2017 ]
A
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 ]
A
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 ]
A
FREE and it makes installing much easier. [ Rick  Nov 13, 2016 ]
A
To interface with steering wheel controls [ LYNLEE  Oct 12, 2016 ]
A
good price and backed by crutchfield [ James  Oct 01, 2016 ]
A
recommended for my vehicle [ TODD A  Sep 24, 2016 ]
A
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 ]
A
Thrown in with the stereo! [ C  Aug 15, 2016 ]
A
Convenience [ WAYMON  Jul 30, 2016 ]
A
Good reviews and price [ Davin  Jul 18, 2016 ]
A
They were recommend for my cars installation [ sarah elena  Jul 14, 2016 ]
A
came with [ Aaron Trent  Jul 11, 2016 ]
A
i needed it [ Anthony  Jul 08, 2016 ]
A
So that I have a good and easy connection [ Philip  Jun 21, 2016 ]
A
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 ]
A
Dope [ Caleb Andrew  Jun 10, 2016 ]
A
Needed for installation [ Eric  Jun 08, 2016 ]
A
Better that cut cables. [ Carlos  May 21, 2016 ]
A
Needed for install. [ Joshua  May 14, 2016 ]
A
Good price and best fit for my Miata. [ Ben  May 04, 2016 ]
A
Makes install much easier and keep the factory wiring intact [ stephen  Apr 26, 2016 ]
A
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 ]
A
This I got to match the car cables to the new stereo cables , might not need it though. [ Ariel  Apr 08, 2016 ]
A
I want to make sure speaker wiring match the vehicle factory harness [ Wilfredo  Apr 05, 2016 ]
A
Ease of install. [ maurice  Apr 02, 2016 ]
A
It was free with the receiver [ Jonathan  Mar 21, 2016 ]
A
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 ]
A
Makes wiring a breeze. Color match and you're done. [ Ann  Feb 16, 2016 ]
A
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 ]
A
why cut the factory harness? [ Jacob  Feb 10, 2016 ]
A
I chose this because it was needed for the stereo head unit that I purchased. [ Blake  Jan 14, 2016 ]
A
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 ]
A
It's we what I needed to install the stereo, plus it was free [ Terry  Dec 10, 2015 ]
A
Based on my history with Crutchfield, if they recommend it, I order it.....Crutchfield has the best service, bar none!! [ Kevin  Dec 08, 2015 ]
SHOW MORESHOW LESS

1 question already asked

Q
Amazon says this product only fits 2001-2007 Mazdas. Will this fit a 2012?
[ Ben  Sep 14, 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  Sep 14, 2015 ]  Staff

Loading articles...

TOP