2-to-4 channel premium sound adapter repair harness

Functionally equivalent to BMW part number 61-10-1-388-934

Plugs into fader connector of a 2 channel standard / premium audio system. Comes with pre-crimped butt connectors to attach to your current wiring near your instrument cluster.  With this adapter you can run an OEM 4 channel radio like the CM5908 or KE83-ZBM with a trunk amplifier in a car with 2 channel premium sound wiring.