Quote:
Originally Posted by andrewn80
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?
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I had a crack in the same spot and thought I fixed it as well but turns out it didn't. My mechanic seems to know what it is but I forgot the name of the part. All I remember is the part and labour is around $600. Some type of diaphragm part that has a crack in it.
I'll ask when I drop by today.