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View Full Version : My speedometer is crazy


Anton CH.
11-20-2004, 02:29 PM
Yestarday when pulling away from a light in heavy traffic, twice the speedometer just shoots up to 40-80 mph. Then it goes back to normal once I pick up some speed (only occurs when I am starting from dead stop). It doesn't happen each time, occured only twice yestarday.
shogun
11-20-2004, 02:34 PM
Check the wires first, if you cannot see anything wrong, remove the speed sensor and check that one.
Sometimes just cleaning helps.

Details here (http://www.bmwe34.net/e34main/maintenance/electrical/speed_sensor.htm)
bahnstormer
11-20-2004, 11:34 PM
or, could u be driving on snow and spinning your tires?
hehehehe =]
Anton CH.
11-21-2004, 05:58 AM
No, that kind of speedometer error usually occurs only on empty parking lots with a heavy foot-no snow here. =]
Just glad to find out that this is not caused by my instrument cluster.
Beemr750
11-21-2004, 06:20 PM
Check the wires first, if you cannot see anything wrong, remove the speed sensor and check that one.
Sometimes just cleaning helps.

Details here (http://www.bmwe34.net/e34main/maintenance/electrical/speed_sensor.htm)


If the sensor is bad it will also effect the cruise control operation.If cruise works OK might want to look into the speedo itself.