Thread: Exhaust Valve on 540i Msport
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      10-23-2018, 02:02 PM   #6
MN
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Drives: Bmw 540i XDrive M Sport
Join Date: Apr 2018
Location: West Midlands

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Quote:
Originally Posted by ksoze View Post
May be a M550iX thing. 540 flap may only open under heavy acceleration.
I think so.

Looks like I have to try the spring thing or go for the MPE in the future
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