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2005 e60 m5 - SMG - 93 000km - no previous malfunctions since the car is mine (since 84.000km)

So, I was changing gear from 3rd to 4rd and the idrive went black for 1 second and instead of change to 4rd, the car reduced to 2nd.

The second time, about 1h later I was cruising on highway on D7 and the gearbox all of a sudden, reduced to 3rd Gear. No faults on the idrive

Previously week the car had “dead battery” but I jumped the car and everything fine. Other than that everything was normal.

Any idea?




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Try this:

Procedure to reset SMG Transmission credit: Ecpp

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Lol at that video... That procedure is in the owners manual, takes 2 minutes to read. To the OP, sounds like voltage regulator is going bad.
 

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Lol at that video... That procedure is in the owners manual, takes 2 minutes to read. To the OP, sounds like voltage regulator is going bad.
LOL, I am sure, but worth a shot...was going to suggest something Electrical next. Thanks!

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