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      09-23-2010, 09:31 PM   #21
Machster50
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Drives: 2004 Z4 2.5
Join Date: May 2008
Location: Canada

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Quote:
Originally Posted by andrewn80 View Post
I have the whistle also on my 2004 z4 2.5i. It happens at low load ~2000rpm and goes away at anything higher or lower.

I checked my air intake and noticed it had a hole in the crinkle section. I was so happy to find that hole because I thought that would solve the problem. I fixed it and the noise is still there. Any other suggestions?

Did you guys fix yours?
Hi Andrewn

Mine was the intake - i taped it up with electrical tape, as i remember, and it worked until the part came in. no more whistles since. Is your noise constant?
Mine only whistled when I exerted the accelerator, thus it was intake related. Try to narrow down when the whistle starts... stops... good luck... try tape in a few places to see if there are air leakages along the intake...
Appreciate 0