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      05-08-2020, 02:24 AM   #1
jrp73
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Drives: E92 330D
Join Date: Jul 2014
Location: United Kingdom

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Rear Axle Differential Lock warning & 1B0A21 Code

Hi Guys,

Has anyone had experience of the rear axle differential lock warning with the error code 1B0A21?

1B0A21 - Rough Road Detection: No wheel speed signal received.

It is also accompanied by the Driving stabilisation error.

The car is currently with BMW who are saying it needs a new diff, I'm skeptical as this error popped up one morning before the car moved leading me to believe it's electrical.

Has anyone had something similar? I can see several people have had the diff error but can't find a great deal on this error code

Thanks,
James
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