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🔧 Upgrade your Mazda’s sound system in minutes—no cutting, just connecting!
The Metra Electronics 70-7903 Wiring Harness is a precision-engineered adapter designed for Mazda vehicles from 2001 onward. It features a 24-pin proprietary connector that plugs directly into the factory radio harness, eliminating the need for wire cutting. Color-coded wires simplify aftermarket radio installation, supporting a 4-speaker setup with durable copper and PVC materials. Lightweight and easy to install, it’s the go-to solution for fast, clean audio upgrades.

| ASIN | B0002BEVXY |
| Best Sellers Rank | #47,799 in Automotive ( See Top 100 in Automotive ) #124 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | Metra |
| Brand Name | Metra |
| Cable Type | proprietary |
| Connector Type | 24-pin |
| Customer Reviews | 4.6 out of 5 stars 1,760 Reviews |
| Global Trade Identification Number | 00086429084739 |
| Included Components | 2000 & Up Mazda Power/4-Speaker Connector |
| Item Dimensions | 7.5 x 4.5 x 1 inches |
| Item Type Name | Mazda Cx-7 2007 Turbo Wire Harness |
| Item Weight | 0.09 Pounds |
| Item dimensions L x W x H | 7.5 x 4.5 x 1 inches |
| Manufacturer | Metra Electronics Corp |
| Material | Copper, Polyvinyl Chloride (PVC) |
| Material Type | Copper, Polyvinyl Chloride (PVC) |
| Model | 70-7903 |
| Part Number | 70-7903 |
| Recommended Uses For Product | Car |
| UPC | 086429084739 |
| Unit Count | 1.0 Count |
| Warranty Description | 30 days |
B**E
Works well
Worked just fine, all connections are clearly labeled and wires are pre stripped. Super easy to use and install.
M**N
Wiring adapter
Excellent product just what I needed to install radio in son's car . No wires had to be cut .
R**N
good price
works good
M**A
Great fit and quality
Great fit and quality
D**N
Simple
Works ok easy to connect and seems strong
T**N
Good
Worked great on 03 mazda tribute
J**A
DO NOT CUT OFF YOUR VEHICLE'S OEM WIRING HARNESS
I might be the only idiot who would ever make this mistake, but I was under the impression that I was supposed to snip the factory wires, removing my vehicle's factory wiring harness, and splice the loose end of these wires onto those wires, and the clip was a standard size that would fit into any aftermarket stereo. I made my life so incredibly difficult - it took about 45 minutes just to find the pinout for my vehicle. I'm now trying to finagle connectors small enough to grab onto my factory wires, which are itty bitty at 20 gauge, and not the same size as aftermarket wires, which are somewhere in the vicinity of 14 gauge. The way this works (if you do it right) is that you splice the stripped end of the wires onto the stripped end of the same color wire on the wiring harness that comes with your new stereo, using heatshrink or push in connectors or butt connectors or whatever (you may want to pull the factory stereo first, just to make sure the new wiring harness fits into the factory wiring harness, but it should). If any colors don't match up, the wires are labeled in small print, and should be labeled on your new stereo harness as well. But for the most part they are standard. Then you carry the whole mess out to the car, and just click your vehicle's white factory harness into the new red harness, plug in the antenna, and slide in your new radio. The factory wire colors are not standardized, it doesn't matter, because the location of each wire is - the pinout is the same in most Mazdas, even though the wires are different colors. The red harness "knows" which hole is which.
B**N
These products always fit perfectly
I have been a mechanic for 32 years and Ive installed quite a few systems on my or friends/family cars. The Metra wiring adapters and installation kits always fit perfectly and provide a professional-looking installation that people are always impressed with.
A**N
Quality product
Bought it for my 2010 Mazda 3 and was a very straight forward install, plugged smoothly into the OE connector, has all the wires you would need to connect to any aftermarket headunit. Be advised you would need a separate controller/adapter for steering wheel audio controls. Cruise control still works as that is a separate system altogether.
J**O
Cumple su funcion
Funciona muy bien, me funcionó bien en mi mazda 6 2014
E**.
C’est bien
Ça fonctionne très bien
V**R
Encaja bien en mazda 3 , 2010
Muy buen producto, y cumple con todas sus funciones
L**Z
I like it
Muy buen producto, facilita el trabajo súper bien
Trustpilot
3 weeks ago
2 months ago