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Pelican Technical Article:

Speedometer Sensor Replacement

Steve Vernon

Time:

2 hour2 hr

Tab:

$15

Talent:

**

Tools:

22mm wrench, Applicable

Applicable Models:

VW Golf GTI (1999-00)
VW Golf GTI 1.8T (2002-05)
VW Golf GTI 20th Anniversary (2003)
VW Golf GTI 337 (2002)
VW Golf GTI GLS (2001)
VW Golf GTI GLX (2000-01)
VW Golf GTI VR6 (2002-05)

Parts Required:

New speedometer sensor or pinion

Hot Tip:

Clean the area around the sensor

Performance Gain:

Working speedometer

Complementary Modification:

Oil Change

If your speedometer starts jumping all around or stops working all together you may need a new speedometer sensor. If the sensor is fine there may be a chance that it is the plastic gear that is on the end of the speedometer pinion inside the differential. The speedometer pinion spins off of a plastic gear attached to the output flange in the diff. If the gear on the output flange has broken then that will mean dropping thee transmission and taking it apart. This article will deal with the replacement of the sensor and pinion.

The job is not that difficult to do but it is one of the most difficult to photograph. I removed the transmission to get better pictures but you certainly can perform this job with the transmission in the car.

The speedometer sensor is located on the top right side of the differential housing (red arrow).
Figure 1

The speedometer sensor is located on the top right side of the differential housing (red arrow). You can easily get to it by safely raising and supporting the car and approaching it from underneath. Note; you do NOT need to remove the drive axle to perform this work, I did it for photographic purposes.

Unplug the sensor (red arrow) from the wiring harness and unscrew from the pinion shaft (yellow arrow).
Figure 2

Unplug the sensor (red arrow) from the wiring harness and unscrew from the pinion shaft (yellow arrow).

Clean around the pinion shaft mounting area before you remove it.
Figure 3

Clean around the pinion shaft mounting area before you remove it. The whole leads directly into the differential and you do not want any dirt or debris getting in. Use a 22mm wrench and remove the shaft (red arrow).

This photo illustrates the pinion shaft (red arrow) with the drive gear (yellow arrow).
Figure 4

This photo illustrates the pinion shaft (red arrow) with the drive gear (yellow arrow). This gear is often what fails. Installation is the reverse of removal.

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Page last updated: Fri 12/9/2016 02:34:26 AM