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Discussion Starter · #1 ·
my 2008 E93 has about 26k miles. On hot days (about 78 degrees or higher) in the bay area, I hear a high pitched whining noise from the engine. I usually have the A/C on when this happens but I hear it after shutting off the A/C too.

Has anyone had this problem before? Any ideas about what's causing this?

Thanks,
sb
 
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