Will this work on a 2005 Mazda 3 and do the colors of the wire match with the factory wire colors in order?

The wire colors corresponded pretty closely as far as arrangement order in the harness itself. I cannot say if it will work in the Mazda 3 because I installed in a Mazda 5.

Do these colors really match, the power wire on my master plug is red but on the harness it’s yellow, does that mean the yellow is my power wire?

No yellow is so the radio will hold its memory. Look it up on YouTube to find the correct wire positions.

Does this include 1p and 1n wires for the swc to work?

When connecting steering controls you will need to connect to the factory side of the wiring harness. These pins are not on the 70-7903 harness.

Does this fit a 2003 Mazda 6?

The correct kit to install an aftermarket radio in this vehicle is the 99-7523S. Which contains the harnesses and dash plastics.

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Metra Electronics 70-7903 Wiring Harness for 2001-Up Mazda Vehicles, Apple

Metra Electronics 70-7903 Wiring Harness for 2001-Up Mazda Vehicles, Apple

Product ID: 3557426

Details

Brand
Metra
Connector Type
24-pin
Item Weight
1.44 ounces
Item dimensions L x W x H
7.5 x 4.5 x 1
Material
Copper (PVC)

⚡No wire cutting needed

🎵Supports 4-speaker audio power

🔌Direct plug-in to factory connectors

S$14

Duties & taxes included

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Description

🔧 Upgrade your Mazda’s sound system in minutes—no cuts, no stress, just pure plug-and-play power!

COLOR CODED PRECISION - Easily identify and connect wires to your aftermarket radio with clear, color-coded wiring.
LIGHTWEIGHT COMPACT - At just 1.44 ounces and compact dimensions, it fits seamlessly without adding bulk.
PLUG PLAY SIMPLICITY - Skip the hassle—connect directly to your Mazda’s original radio harness without any wire cutting.
EFFORTLESS AUDIO UPGRADE - Power your new stereo system with a reliable 4-speaker connection for immersive sound.
TAILORED FOR MAZDA 2001 - Engineered specifically for Mazda vehicles from 2001 and up, ensuring perfect compatibility every time.

The Metra Electronics 70-7903 Wiring Harness is a precision-engineered adapter designed for Mazda vehicles from 2001 onward. It enables fast, clean installation of aftermarket radios by plugging directly into factory connectors, eliminating the need for wire cutting. Featuring color-coded wires for easy hookup and supporting 4-speaker audio power, this lightweight harness ensures a seamless upgrade to your car’s sound system.

Specifications

ASIN	B0002BEVXY
Best Sellers Rank	#68,776 in Automotive ( See Top 100 in Automotive ) #187 in Automotive Replacement Electrical Wiring Harnesses
Brand Name	Metra
Cable Type	proprietary
Connector Type	24-pin
Customer Reviews	4.6 4.6 out of 5 stars (1,763)
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	1.44 ounces
Manufacturer	Metra Electronics Corp
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

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