This harness connects to your factory subwoofer connection and provides a pair if RCA for an aftermarket amplifier.
Compatible Cars
Below we will list the part number of your your factory sub box and the harness needed.
Audi
Q8
4M8 035 621 A – 4 Pin 4 Wires (1234)
4M8 035 621 – 4 Pin 2 Wires (1004)
4M8 035 621 B – 2 pin 2 Wires (12) – B&O
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