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Old 04-24-2013, 08:11 PM
mdrob70 mdrob70 is offline
Location: Central PA
Join Date: Mar 2010
Posts: 53
Mein Auto: 2010 X5 3.0i
Originally Posted by 745iguy View Post
Mines did this was the rubber boot that connects to the Throttle Body; 18$ part from a dealer (mines was free caught it when purchasing) and not much work to replace, inspect for a post maf vacuum leak.
Was a high pitched whistle only on acceleration.
If you can have a buddy press the pedal while you're looking under the hood to pinpoint the noise area if its not as obvious as mine was.
I can confirm that this boot can be a culprit when cracked. Experienced the same issue, and just had it replaced. No more whistle.
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