Brand New Front Anti Lock Abs Brake Wheel Speed Sensor For 2000-2003 Audi A6 S4 And S6Replace your prone to fail wheel speed sensors with this new direct replacement sensor. Symptoms of a malfunctioning ABS/SPEED sensor include having your ABS improperly engage or not engage ABS light staying on and poor braking performance. The factory ABS sensors have been known to fail and unfortunately the dealers' solution to this problem is cleaning the sensors rather than replacement which most often results in the reoccurrence of the same ABS problem. Includes 1 sensor with harness connector.Manufacturer: AIP Electronics100% New ConstructionHigh Quality OEM Replacement PartFit and Quality GuaranteedReady for Install Straight out of the boxChannelSaleTech-specs4B0927803B ALS521 5S10471 5S10470 SU11923 SU11924 FSE51406