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Old 02-11-2013, 08:14 PM
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Keyser Soze Keyser Soze is offline
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Location: Northern California
 
Join Date: Oct 2003
Posts: 1,495
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.
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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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