Here is the stereo radio wiring information for your 1998 BMW 3-Series E36 328i with the standard, symphony, or Bose systems. It will be useful when installing an aftermarket radio, sound stereo system, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your E36 328i BMW. Please check it over and use it as a GUIDE to help you locate the appropriate wires. This schematic is provided free of charge and may not be 100% accurate. Failure to properly test all the wires may lead to vehicle or bodily damage. All information is provided as-is and accuracy is not guaranteed.

If you find any conflicting info please leave a comment with what you found in your BMW 3-Series including the 328i. If you don’t see the wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!

Keep in mind if you are installing a new radio you may need the radio removal  keys, the wiring harness, the antenna adapter, and the mounting kit as well. See the links below to purchase these items.

1998 BMW 3-Series E36 328i Car Audio Stereo Radio Wiring Diagram Schematic Colors

Car Radio Constant 12v+ Wire: Red/White
Car Stereo Ground Wire: Brown
Car Radio Ignition Switched Wire: Purple/White

Car Stereo Dimmer Wire:

Car Radio Illumination Wire:
Car Stereo Power Antenna:
Car Radio Amp Turn On Wire:  White +

** FOUND AT BACK OF RADIO OR AMP **

Left Front Low Level Ouput to Amp Wire (+) Positive: Yellow/Red
Left Front Low Level Output to Amp  Wire (-) Negative: Brown/Orange
Right Front  Low Level Output Speaker Wire (+) Positive: Blue/Red
Right Front Low Level Output Speaker Wire (-) Negative: Brown/Orange

Left Rear Low Level Output Speaker Wire (+) Positive: Yellow/Black
Left Rear Low Level Output Speaker Wire (-) Negative: Brown/Orange
Right Rear Low Level Output Speaker Wire (+) Positive: Blue/Black
Right Rear Low Level Output Speaker Wire (-) Negative: Brown/Orange

** FOUND AT AMP IN REAR **

LF Tweeter Speaker Wire (+) Positive: Yellow/Black

LF Tweeter Speaker Wire (-) Negative: Yellow/Brown

LF Front Left Mid Speaker Wire (+) Positive: Yellow/Red

LF Front Left Mid Speaker Wire (-) Negative: Yellow/Brown

RF Tweeter Speaker Wire (+) Positive: Blue/Green or Blue/Black

RF Tweeter Speaker Wire (-) Negative: Blue/Brown

RF Front Right Mid Speaker Wire (+) Positive: Blue/Red

RF Front Right Mid Speaker Wire (-) Negative: Blue/Brown

LR Rear Left Tweeter Speaker Wire (+) Positive: Yellow

LR Rear Left Tweeter Speaker Wire (-) Negative: Brown

RR Rear Right Tweeter Speaker Wire (+) Positive: Blue

RR Rear Right Tweeter Speaker Wire (-) Negative: Brown

 

LF Woofer Speaker Wire (+) Positive: Yellow / Red @ Amp Pin 7

LF Woofer Speaker Wire (-) Negative: Yellow / Brown Pin 8

RF Woofer Speaker Wire (+) Positive: Blue / Red @ Amp Pin 9

RF Woofer Speaker Wire (-) Negative: Blue / Brown Pin 10

LR Left Rear Woofer Speaker Wire (+) Positive: Yellow/Purple or Yellow/Gray @ Amp Pin 11

LR Left Rear Woofer Speaker Wire (-) Negative: Yellow/Gray or Yellow/Black Pin 12

RR Right Rear Woofer Speaker Wire (+) Positive: Blue/Purple @ Amp Pin 5

RR Right Rear Woofer Speaker Wire (-) Negative: Blue/Gray Pin 6

Center Channel Speaker Wire Positive / Negative:

Subwoofer Speaker Wire Positive / Negative:

Front Speaker Size: N/A

Rear Speaker Size: N/A

Amp Amplifier Location: Driver side in trunk

Radio Removal: See Service Manual