Quote:
Originally Posted by cidair
For 550 owners - check the vacuum valve in the trunk ( left side behind the cover ). Mine was stuck due to dirt/dust been sucked in. It will cause the boost pressure to fail or fluctuate.
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Greetings, 2011 F10 550xi here, I took out all the covers and I didnt see anything that looked like a pump, only saw radio amp, maybe a bluetooth module . . . please help, pics if possible. My DTM error comes up when I try to accelerate hard, and the check engine light stays on.