E30 17 pin Sound System wiring adapter for OEM E36 radios

This adapter converts your factory wiring for E36 radios equipped with the 17 pin connector, including the C33, C43 and CD43.  It is electrically identical to BMW the BMW 4 channel wiring adapter for Sound System cars.

WARNING: your factory wiring shares radio output grounds across channels. Most modern aftermarket radios REQUIRE separate radio output grounds for each channel, because their internal amplifiers use a  "class D" design with "differential outputs".  If you plan to run your speakers directly from this type of aftermarket radio, YOU MUST ALSO MODIFY YOUR FACTORY WIRING with one of our no-cut OE wiring conversion kits:

OEM Sound System cars: your radio output wiring has a single shared ground wire used by all channels. Install our Sound System conversion kit for aftermarket and E36 radios, available separately  

Add Sound System to OEM Radio Only cars: all cars with factory radio only wiring that included a fader connector have shared radio output grounds for each side (FL and RL share grounds, as do FR and RR).  You will need our radio only Sound System conversion kit for aftermarket radios, available separately