BMW M3 Stereo Wiring Info
- The M3's wire harness contains the essential wiring, including the power, speaker and ground wires. This should be connected with the matching port on the back of the new stereo, located on the right-hand side. Push the wire harness into the connection until it clicks into place with the locking tab.
- The radio antenna provides the AM/FM signal to the radio. The thick black radio antenna cable should be plugged into the radio antenna port on the left-hand side of the rear of the stereo.
- Push the newly wired stereo into the M3 dash's housing until it is fully inserted. Secure the brackets with screws and replace the removed sections of the dashboard.
Wire Harness
Radio Antenna
Inserting
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