Audi Cars 1999-05

Wheel Speed Sensor Rotors (Toothed Rings)


Removal & Installation


On A4 and 1998-00 Passat models, the front tone rings are part of the outer CV-joints and not available as a separate part. If the tone ring must be replaced, the outer CV-joint must be replaced. For additional information, please refer to the following topic(s): Drive Train, Halfshaft, CV-Joint and Boot Overhaul

FWD Vehicles
  1. Note the radio security code and disconnect the negative battery cable.
  3. Remove the rear brake disc assembly.
  5. Using a suitable brass punch, drive the tone ring off the rotor by tapping it from side to side from the inside of the hub where the wheel bearing races are located.

To install:

  1. Carefully press the tone ring onto the inside of the brake rotor making sure it is fully seated.
  3. The balance of the installation is in reverse order of removal.

Click image to see an enlarged view

Fig. The front ABS tone (exciter) ring is part of the outer CV-joint on A 4 and 1998-00 Passat models. The rear tone ring is similar on the AWD version of these models