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Found intermittent stalling problem. Must read! (archive)
[ Follow Ups ] [ M5 (E28) Message Board ] [ Msg. Board FAQ ]
Posted by Ken on February 28, 2002 at 09:17:09:

I posted a message a few weeks ago about an intermittent stalling problem, the car would die sometimes when accelarating, braking or turning hard. After talking to a very helpful Bmw 'M-car' Mechanic, I was told of a very common problem with the M5 computer. The main power transister on the main logic board develops small cracks in its solder joints. The transisister is a very large plate that stands vertical with a large round transister mounted on it. It is held to the board with very few pins, these pins develop very small cracks in them that can only be seen with a magnifying glass. Resoldering these pins solved the problem. I saved $1000 with this information. If your car has the same problem give this a check.

Thanks to all who originally tried to help with the problem.
Ken

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