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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 04-13-2014, 08:36 AM
Abbyguy Abbyguy is offline
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Location: Abbotsford, BC
 
Join Date: Nov 2013
Posts: 18
Mein Auto: 2011 323i
Sound from rear wheel well pass side

Twice lately after shutting down engine I heard a sound coming from the rear pass wheel area when I just happened to walk by the rear of the vehicle. I crouched down to listen closely and thought it was the sound of air escaping from the tire. That was not the case. It continued for about less than a minute then stopped abruptly with what sounded like a pop. On the second occasion I know the battery is located in that area so I quickly opened the trunk and exposed the battery enclosure. The sound didn't appear to emanate from that area. Quickly I went to the wheel well again, the sound was still there and then stopped. Doesn't occur every time but I check each time now when parking the car in the dead silence of the underground parking area when there is no ambient noise present. Anyone else experience this sort of thing? As always feedback is appreciated.
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Old 04-13-2014, 09:07 AM
fdriller9 fdriller9 is offline
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Location: NJ/Philly
 
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Mein Auto: '06 AW 330xi
It's the DMTL pump pressurizing the EVAP system....perfectly normal.

It's an emissions related system.
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Old 04-13-2014, 09:41 AM
Abbyguy Abbyguy is offline
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Location: Abbotsford, BC
 
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Posts: 18
Mein Auto: 2011 323i
Quote:
Originally Posted by fdriller9 View Post
It's the DMTL pump pressurizing the EVAP system....perfectly normal.

It's an emissions related system.
Thanks...appreciate the response and knowing it's normal.
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