Heavy Duty 8E0927807C Rear Left ABS Wheel Speed Sensor Fit FAW Audi A4 B7 On the Audi A4 B6/B7, the rear-left wheel-speed signal shares its loom with the rear ride-height sensor (G76) that feeds the automatic xenon headlight leveling. So when this pick-up drifts — the 1650 Ω coil ageing, the 6-pin rectangular plug oxidising, or the branch by the rear strut tower chafing — you don't just get the ABS lamp. You also get headlight range control defective , a C003x rear-left