OEM 2-to-4 channel standard sound adapter harness Fader type:Flat blade (86 and earlier) 3) Return shipping will be

3) Return shipping will be added to your order

NOTE: Also works for 4 channel radio installs in cars built ONLY up to mid-89

Also available in a 3D printed version for a bit less

anywhere from 2-5 out of 10 OEM radios require additional work

With this adapter you can run an OEM 4 channel radio like the CM5908 or KE83-ZBM without a trunk amplifier in a car with 2 channel radio-only wiring

OEM 2-to-4 channel standard sound adapter harness Fader type:Flat blade (86 and earlier) 3) Return shipping will beNo longer available from BMW. Plugs into fader connector of a 2 channel standard radio only audio system. With this adapter you can run an OEM 4 channel radio like the CM5908 or KE83 ZBM without a trunk amplifier in a car with 2 channel wiring. Picture is the round pin fader connector version. Flat blade connector version for pre 87 cars also available