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Hehehe......
This sounds like a good case of a BSD fault. I accidentally left a ground bolt loose after I did my large valve seal project on my 550i. It leads to three main components of the BSD system.
Oil level sensor
Alternator
DME
I changed out the alternator, no change
Changed out the oil level sensor, works beautifully.
Go the cheapest route first, and change out the sensor. I replaced the alternator as a precaution.
I'm happily will spend 250 dollars on a low mileage x5M alternator and a 7 dollar oil level sensor from the junkyard 2007 750li vs a 3k plus dme......and that isnt the issue lol.
Change out the sensor, make sure the ground bolts that holds the injection harness are secured/torqued
report back.
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