Hi, I have replaced the discs and pads on my A4 1.8T but now the ABS light has come on!!!! I have only replaced the drivers side front and rear and the passenger front due to ending up in casualty trying to undo the rear passenger side caliper bolts! Could the ABS light be on because i have only replaced 3 of the brakes??? Im sure i didnt damage any of the sensor wires when i was working on it. Do you have to reset the ECU after replacing discs and pads?? Im very confused! Any advice would be very welcome!!!!!!!!!! Regards, Anthony.