BMW Z3 Stereo Wiring Diagrams

Disclaimer: Please double check these mappings for your vehicle, especially the polarity.

1998-2002 Z3's without the Harmon Kardon stereo
Speaker Leads (in twisted pairs)
Speaker	+	-
Right Front Woofer	Blue w/ red stripe	Blue w/ brown stripe
Right Front Midrange*	Yellow w/ red stripe	Brown w/ orange stripe
Right Front Tweeter
Left Front Woofer	Blue w/ white stripe	Blue w/ brown stripe
Left Front Midrange*	Yellow w/ blue stripe	Yellow w/ gray stripe
Left Front Tweeter
Right Rear Full-range	Solid blue (small gauge)	Solid brown (small gauge)
Left Rear Full-range	Solid yellow (small gauge)	Solid brown (small gauge)
Right Subwoofer**	Solid blue (large guage)	Solid brown (large gauge)
Left Subwoofer**	Solid yellow (large gauge)	Solid brown (large gauge)
Low-level Leads (in twisted pairs, solder to RCA jacks)
Channel	+	-
Right Front	Blue w/ black stripe	Yellow w/ brown stripe
Left Front	Blue w/ purple stripe	Blue w/ gray stripe
Right Rear	Blue w/ brown stripe	Brown w/ black stripe
Left Rear	Yellow w/ red stripe	Yellow w/ brown stripe
Power Leads
12 Volt +***	Red w/ white stripe
Ground***	Solid brown, large guage
Remote turn-on (for amplifier)	Solid white, small guage

* Use the midrange wires and location (forward-most in the door panel) for an aftermarket tweeter.

** The non-HK stock subwoofer has a dual voice coil 5.25" speaker - hence the right and left channels even though it is just a single powered speaker in the subwoofer enclosure.

*** I wouldn't recommend using these power and ground wires for an aftermarket amplifier of anything other than the lowest quality. The battery is right there in the trunk, making running new larger gauge power and ground wires easy.

2001-2002 Z3's with the Harmon Kardon Stereo Upgrade (click for larger image)

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