I need some advice regarding my 318i. My odometer appears to be showing my mileage incorrectly. I have checked this by driving a measured kilometre and it is definitely out of calibration. What can anyone suggest? Also, how can I tell if my motor is an M10 or M40?
Thanks for an immensly helpful site.
Odometer error?
Moderator: martauto
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smithy318i
- Engaged to the E30 Zone

- Posts: 5797
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Replace the guage or the whole cluster.
as for M10/M40
M10 to '87
M40 '87 on
as for M10/M40
M10 to '87
M40 '87 on

Someone might have put a 6 cylinder instrument panel into your 4 cylinder car.
( i put a 4 cylinder into my 325 and the revs went up a lot. Not sure if this will affect your speedo though)
They might do this to get a working SI board.
What you could do is find a relacement panel. But keep the SI board from your own, if its working.
( i put a 4 cylinder into my 325 and the revs went up a lot. Not sure if this will affect your speedo though)
They might do this to get a working SI board.
What you could do is find a relacement panel. But keep the SI board from your own, if its working.

