 Sounds coming from engine
Hey everyone. I have a 2006 325I with only 40k miles on it. When I turn the car on and it stays in park, it makes a weird rumbling sound as if it's coming from the engine or possibly the breaks? I'm not sure. When I'm stopped at a light, it does the same thing. I've brought it to the BMW service (I have the extended warranty on it and everything), and they don't hear it. Every time I bring it, it doesn't make the noise. My mother, brother, and a few friends have heard it while in the car with me. If anyone knows what it could be, please let me know so I can have the service center actually check it out since they all think I'm insane. The noise is sooo annoying!! Please help!! | 
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