2003 Honda Civic Stereo Wiring Harness - AutoZone Equip cars, trucks & SUVs with 2003 Honda Civic Stereo Wiring Harness from AutoZone. Get Yours Today! We have the best products at the right price. 2003 Honda Civic OE Wiring Harnesses & Stereo Adapters Honda Civic Sedan 2003, Aftermarket Radio Wiring Harness by Scosche®, with OEM Plug. Up yourself and your tunes over the factory installation with top-of-the-line audio products from Scosche. Built for just about any kind of music..