Audi Cars 1999-05

Speed Sensor

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Removal & Installation



Cable Driven Mechanical Speedometers

The speed sensor is mounted to the backside of the speedometer.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the instrument cluster assembly.
  4.  
  5. From behind the cluster, detach the harness connector at the speedometer.
  6.  
  7. Unscrew the sensor from the instrument cluster and remove it.
  8.  

To install:

  1. Position the sensor in place and screw it in securely.
  2.  
  3. Connect the wiring to the sensor and instruments and install the instrument cluster.
  4.  
  5. Connect the negative battery cable. Road test the vehicle and check the cruise control operation.
  6.  

Electronic Speedometers

On vehicles equipped with electronic speedometers, the speed signal for the cruise control unit is received from the Vehicle Speed (VSS) Sensor located on the transmission. Some early models had an electronic speed sensor that was driven by a small gear via a short cable. On subsequent models, the VSS is a hall type sensor.

  1. To remove, first disconnect the electrical connector.
  2.  
  3. On models held in place by a single fastener, loosen and remove the retaining bolt securing the sensor into the transaxle assembly.
  4.  
  5. On models with a hex shaped housing, use a 22 mm ( 7 / 8 inch) wrench to remove the sensor.
  6.  
  7. Remove the sensor.
  8.  
  9. Installation is in reverse order of removal. If the sensor is equipped with an O-ring lubricate the O-ring with a light coat of petroleum jelly or motor oil before installation.
  10.  

 
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