Quote:
Originally Posted by bfleming
I'm not sure where you got that information, but all E90's have reluctor rings & corresponding pulse sensors on all four wheels. The reluctor ring is pretty well hidden in the rear hub, but it's there.
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Owners of late E90's (e.g. around 2010 onwards) have said that the rear reluctor rings have been replaced by a hall sensor setup incorporated into the wheel bearing.