Contact us
Close contact box

Scosche C4MA02 Wiring Interface

Allows you to connect a new car stereo and retain the Bose® audio system in select 1993-up Mazda vehicles

Item # 142C4MA02

The Scosche C4MA02 wiring interface allows you to integrate a high-powered aftermarket receiver into select 1993-up...

Find what Fits your car

The Scosche C4MA02 wiring interface allows you to integrate a high-powered aftermarket receiver into select 1993-up...

California customers:
Please click here for your Proposition 65 warning.

Item # 142C4MA02

This item is no longer available.

About the Scosche C4MA02 Wiring Interface

The Scosche C4MA02 wiring interface allows you to integrate a high-powered aftermarket receiver into select 1993-up Mazda vehicles with premium factory systems. The package includes the OEA-4 adapter and a Mazda-specific harness. The OEA-4 unit has output-level gain controls for each of its four channels which can be adjusted to properly match the new receiver to the factory amplifier.

The Scosche C4MA02 wiring interface allows you to integrate a high-powered aftermarket receiver into select 1993-up Mazda vehicles with premium factory systems. The package includes the OEA-4 adapter and a Mazda-specific harness. The OEA-4 unit has output-level gain controls for each of its four channels which can be adjusted to properly match the new receiver to the factory amplifier.

Note: If you haven't already, please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle.

Details:
  • 4 speaker-level inputs
  • output level adjustments for all four channels
  • works best with high-powered aftermarket receivers
  • dimensions: 3-15/16"W x 15/16"H x 2-1/16"D
  • 1-year warranty
READ LESS

What's in the box:

  • OEA-4 OEM Amp interface (with 8-wire input with bare wires/8-wire output with 2 white rectangular connectors)
  • Flat-blade screwdriver (attached to interface module)
  • 13 Crimp caps
  • Instruction sheet

Customer reviews

Loading reviews...

Scosche C4MA02 Wiring Interface Reviews

Average Customer Review(s):

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

Pros:

Cons:

Crutchfield response

More details on the Scosche C4MA02 Wiring Interface

Stacey B.

Product Research

Features

Compatibility: The OEA-4 (model C4MA02) is a non-electronic interface that allows an aftermarket high-power stereo to integrate into select 1993-up Mazda vehicles with Bose premium factory systems. Please check the Crutchfield Vehicle Selector for compatibility for your vehicle.

Adjustment Gain Controls: Four rotary gain controls (front left, front right, rear left, rear right) are located recessed inside the adapter chassis. There is a small flat-blade screwdriver attached to the adapter's case, and its use is recommended. The controls are very fragile and sensitive, and a slight adjustment will change volume dramatically.

Harnesses: The adapter's input wires are approximately 5-1/2" long with bare ends. These splice to the new receiver's speaker output wires. The adapter's output wires are approximately 11" long and terminate into two white rectangular Molex plugs. There are 4 additional wires coming from one of the white plugs that should be spliced to the receiver's wiring harness. The Molex plug ends are molded to match with the factory wiring harnesses. Crimp caps are provided for wire splices.

Loading accessories...

Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Must have to use the recvr purchased [ Ray  May 25, 2018 ]
A
to make it easier to connect. [ Marshall  Apr 03, 2018 ]
A
Free [ mitch  Aug 27, 2017 ]
A
Ready to go at a fraction of its cost by itself? Sign me up! [ Andrew  Aug 20, 2017 ]
A
Recommended for installation. [ William  Aug 19, 2017 ]
A
I needed this so my new stereo would be able to work with my stock speakers. My speakers came stock Bose with factory amp in a 2000 Miata LS. [ Gavin  Dec 29, 2016 ]
A
To make the Bose speaker compatible with a standard radio [ Dyron Dennis  Aug 05, 2016 ]
A
Allowed me to use my stock Bose sound system in my Miata and [ Zachary  Apr 08, 2016 ]
SHOW MORESHOW LESS

1 question already asked

Q
I have bought a BOSE 6 piece powered car sound system. I have on how to install these system to a different two din head unit but this one as said in the article needs the scosche oem amplifier adapter. In these oem adapter it says only four speakers while mine has 4 speakers and a sub woofer. How about the sub woofer, doesn't have a connection also so as to come to 5 speakers connection?
[ Mark  Aug 09, 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  Aug 10, 2014 ]  Staff

Loading articles...

TOP