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Speedo Works, But Odo Doesn't?
Question:
Anyone have any idea why the odometer in my ‘86 528e would stop working, yet at the same time the speedometer works just fine? I know one of the things to check is the speed sender at the differential, but if the speedometer is working, this wouldn’t seem to be at fault, right? .In addition, all OBC functions that need to know about distance traveled (such as the RANGE function, and AVG MPH) are not working, nor is the MPG gauge. I suspect these problems are all related. Anyone ever run across something like this? Ideas of things to check? BTW – all other functions in the instrument panel (tach, fuel gauge, temp gauge) are all working fine. Consequently I suspect this has nothing to do with batteries on the SI board (a common source of problems with instruments in these cars).
Yup, it’s a VDO speedometer and the little plastic gear that inside that drives the odo is slipping. In severe cases the gear will split. Best fix is to have a speedo shop install a new little gear, but if it’s not split, some people have had success with a drop of superglue… (Proceed at your own risk, no warranty implied.) — Arne Berglund Reply to: arne(at)rio(dot)com 1981 323i 1992 K75RT The BMW E21 GrayMarket Web Site http://www.rio.com/~arne/e21gmr.html Think Different — Made With Macintosh
Response:
Anyone have any idea why the odometer in my ‘86 528e would stop working, yet at the same time the speedometer works just fine? I know one of the things to check is the speed sender at the differential, but if the speedometer is working, this wouldn’t seem to be at fault, right? .In addition, all OBC functions that need to know about distance traveled (such as the RANGE function, and AVG MPH) are not working, nor is the MPG gauge. I suspect these problems are all related. Anyone ever run across something like this? Ideas of things to check? BTW – all other functions in the instrument panel (tach, fuel gauge, temp gauge) are all working fine. Consequently I suspect this has nothing to do with batteries on the SI board (a common source of problems with instruments in these cars). -Chip — (For e-mail, remove "NOSPAM" from return address)
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