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      11-17-2017, 08:42 AM   #2
Naz24
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Drives: W205 AMG C63 / E70 X5M
Join Date: Mar 2014
Location: North/Central NJ

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Quote:
Originally Posted by Toneaero View Post
Anyone know where the vacuum pump is located for the exhaust flap in the OEM exhaust? When I hit the "M" button, the valve normally opens but I believe the pump needs to be replaced as it no longer opens on cold starts, WOT, and when I activate M mode.
I had this problem. It was as simple as lubing up the actuator. Get under there and see the flap actuator from the outside of the exhaust, see if it is tough to move. Add WD-40, DONE!
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2017 C63
2012 X5M
SOLD: 2015 M3; 2007 X3 M Sport; 2014 X3 M Sport 35i; 2004 X5 4.4i; 1994 325i
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