5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
So my speedometer has been acting strange lately. When I start the car, sometimes the speedometer needle will have a high frequency oscillation at the "0" reading. It just sits there jumping around at zero. Normally, I turn the key on and off a few times and it stops. Once it stops it behaves normally again. Well today, I could not get it to stop. So I decided to drive away and see what happened (bad idea). It went from oscillating over the zero and shot right up to the 20 MPH indication. Now, when I stop, the speedo hardstops at the 5 MPH setting and won't go below it. Even at a dead stop. It used to sit at zero at a dead stop. In addition to that, the speedometer is now 5 MPH off all the time. I verified this by turning on my cruise control which now reports a speed 5 MPH different from the needle reading. So it looks like my speedo's totally screwed. The car is still under factory warranty so it will be going back to the dealership. I was just curious if anyone here had experienced this problem and what the fix was. I will report back when I get done with the dealer.
I'm glad to hear that you still have warranty coverage left on your car. This is the type of weird stuff that is hard to diagnose over the web. I haven't heard of anyone with the same type of problem you are having, but this is not the first time I read about a speedo going crazy on these cars. May have been caused by a bad connection, etc., or even a bad IC inside teh instrument cluster.
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