I erased all the codes but as soon as I started it engine failsafe and all engine related codes came back. At idle speed engine rpm varied a lot and when slowing down every time transmission downshifted from two to one rpm dropped below 500 for a second and came back up. I bought new throttle body and maf sensor for $340 which I think isn't a bad price. Will install it once it arrives and see if it solves my issue.
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2002 BMW X5 4.6is
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