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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Weird noises when shifting
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      09-22-2014, 10:37 AM   #1
richie_s
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Weird noises when shifting

I noticed a weird noise coming from my car when I shift. It only happens when I go from first to second or second to third. It sounds like an exhaust flap opening and closing and I can only hear it when the window is open. The sound appears about 1 or 2 seconds after the clutch is released and the car is in the new gear

It happens at random moments too. What is it?
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      10-28-2014, 11:14 PM   #2
uaizaz
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Quote:
Originally Posted by richie_s
I noticed a weird noise coming from my car when I shift. It only happens when I go from first to second or second to third. It sounds like an exhaust flap opening and closing and I can only hear it when the window is open. The sound appears about 1 or 2 seconds after the clutch is released and the car is in the new gear

It happens at random moments too. What is it?
I would Imagine it's your exhaust flap opening? Assuming you have a 335
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      06-11-2015, 03:49 AM   #3
richie_s
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Quote:
Originally Posted by uaizaz View Post
I would Imagine it's your exhaust flap opening? Assuming you have a 335
It certainly does sound like the exhaust flap, but why does it open and close from 1st to 2nd gear? I can hear it at almost every 1st to 2nd gear shift.
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