Stereo Wire Harness Audi A4 (w/ Symphony radio) 00 01 2000 2001 (car radio wiring installation parts) Aftermarket Radio / Stereo Installation Wire Harness Connects directly into vehicle harness (minimum or no cutting or splicing of factory wires) Professional wiring harness (EIA color coded to match the aftermarket wiring) Use for factory amplified factory stereo systems only (ex. JBL, Bose, HK, etc.) Aftermarket radio has to have RCA audio outputs.