Quote:
Originally Posted by ///Mposter
Hi , I'm addressing you. I have had different sounding noise on my 335i than the X3 . Both were boost solenoid a. On my 335i it sounded like it was coming from the radio or behind the dash and was intermittent. With the X3 it was at idle and would go away as the pedal is pressed. I couldn't say that there is a specific reason why yours is different but maybe if you could have someone try to rev it while you have the 5 minute warm up you state it happens;maybe you will hear something.
I was also surprised at how much it was moving/buzzing once I did locate it on the X3.
Also electrical items tend to work different in warmer temps than colder. Coils are a great example. Possible misfire at warm up/ start up but fine after a drive cycle.
Well whatever the case is, I hope you are able to find the noise. Maybe a go pro under the hood would help.
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Thanks a lot! The car is at the dealer right now for this noise, so I will ask them to check that too.