Steering Wheel control Primary harness adapters convert the commands from your car's steering wheel controls to a code that an aftermarket radio can recognize. A patch lead is also requires for SWC type systems based on the brand of head unit you have.
CHBM5C
Quadlock
to suit BMW
- 5 Series (E39)
- X5, X3, Z4 & Mini (<08). K bus Quadlock (not CAN)
Replaces CHBM5A