2006 BMW 330i Q&A

2006 BMW 330i Question: High pitched squeek upon light acceleration

I have a high pitched squeeking noise upon light acceleration. It seems to be inconsistant. But, you can hear it. Any ideas on what it could be? -
Answer 1
Sometimes you can hear a similar sound when the breather system (PCV) failed. A BMW specialty shop should be able to check the PCV pressure with a manometer. Zee -
Answer 2
parking brake. just had mine fixed -
Answer 3
If the sound is originating from the right rear wheel, it may be the brake pad wear sensor. It apparently will "flex" enough and make contact, producing the squeak. Really annoying; a local BMW shop should be able to adjust it, but it may set you back ~ $100. Design-flaw. -