Heavy Duty 8E0927807B Rear ABS Wheel Speed Sensor Fit FAW Audi A4 B7 On the FAW Audi A4 B7 (8EC sedan / 8ED Avant, 2005–2008) the rear wheel-speed signal comes from a passive inductive pick-up with a ~1.3 m lead tucked along the rear trailing arm. When the coil drifts off the 1.7 kΩ mark or the rectangular plug oxidises, you get the ABS and ESP lamps, a speedo that hesitates, and a C003x rear-wheel code that clears on scan but returns after the next car wash. 8E0927807B fits