2000 Volkswagen Passat OE Wiring Harnesses & Stereo Volkswagen Passat 2000, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler. Stereo Radio Wiring Diagram - 2000 Volkswagen Passat Whether your an expert installer or a novice enthusiasts with a 2000 Volkswagen Passat, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2000 Volkswagen Passat.