odometer and trip reading on 1990 BMW 325i

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my odometer and trip stoped working is that electrical?or did something come loose? where do i start to find the problem is it on the trans? or is it a fuse? or wireing problem how can i trouble shoot that problem
(2) Answers
(2) Comments
If the speedo still works, then it is in the odometer, if the speeod is inop, then inspect the speedo speed sensor.