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Old 02-11-2013, 07:14 PM
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Keyser Soze Keyser Soze is offline
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Location: Northern California
Join Date: Oct 2003
Posts: 1,622
Mein Auto: 2013 535
Ok, I had a similar issue with my E46 that drove me crazy for months before resolved it. It sounded like a a very faint whiny dental drill and I really thought it was electronic interference or something for sure. It didn't change with revs or anything just that high pitched noise. I finally tracked it down to a leaky air intake elbow. I highly doubt it's cracked from age already on an F10 like it would on a well flogged E46 but perhaps it's loose enough to make the noise but not enough to kick off an error code with the MAF sensor. Just something to consider.
2013 F10 535i M-Sport, Sophisto Grau, 6-speed MT
2011 E90 335i Sport, Jet Black, Sport Auto, Performance Edition
2002 E46 330i Sport, Jet Black, 5-speed MT, lots of upgrades
2001 E46 330Ci Sport, Steel Grey, 5-speed MT....and more

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