When replacing your factory radio with an after-market car stereo, the BWH-470 wire harness is a must for a quick and clean installation. It eliminates cutting your OE radio plug. After connecting it, your install is simple as the wires will color-match and easily connect to the after-market stereo. Without the BWH-470, you would have to cut the OE radio plug and manually test each wire to connect to your after-market receiver.Features Compatible with Select 1990-2002 BMW Vehicles