smell of exhaust in the car

GeorgeR · 12-20-2019, 04:46 PM

I recently started noticing the smell of exhaust in the car, a 2009 335i E92, while either stopped in traffic or while moving slowly in traffic.

I recently had a sound system upgrade installed and asked my installer if they could have done anything. They mentioned they wouldn’t have worked in areas that would have opened any holes. They mentioned the only thing that might be causing it is when playing music, the pressure from the sub is opening the Breather Flap in the trunk. This breather flap is design to release pressure from closing doors. I’ll test this and see if it helps.

I haven’t noticed it while parked and idling, which I have done a bit of while testing my new sound system.

Any thoughts on why I might be noticing this all of the sudden?

I usually keep my car in Automatic recirculated-air mode.

Thanks

El Cheapo Loco · 12-20-2019, 06:19 PM

Check if your valve cover is leaking oil onto the exhaust manifold. When my valve cover was leaking, I sometimes see a waft of smoke from under the hood. And if I have the air on, the smoke would enter the cabin because the air filter is at the base of the windshield.

12-20-2019, 04:46 PM	#1
GeorgeR Second Lieutenant 279 Rep 217 Posts Drives: 2016 X6 XDrve35i 2009 335i E92 Join Date: Dec 2014 Location: Seattle, WA iTrader: (0)	smell of exhaust in the car I recently started noticing the smell of exhaust in the car, a 2009 335i E92, while either stopped in traffic or while moving slowly in traffic. I recently had a sound system upgrade installed and asked my installer if they could have done anything. They mentioned they wouldn’t have worked in areas that would have opened any holes. They mentioned the only thing that might be causing it is when playing music, the pressure from the sub is opening the Breather Flap in the trunk. This breather flap is design to release pressure from closing doors. I’ll test this and see if it helps. I haven’t noticed it while parked and idling, which I have done a bit of while testing my new sound system. Any thoughts on why I might be noticing this all of the sudden? I usually keep my car in Automatic recirculated-air mode. Thanks
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12-20-2019, 06:19 PM	#2
El Cheapo Loco douchebaggo 186 Rep 972 Posts Drives: stick Join Date: Oct 2009 Location: CA iTrader: (1)	Check if your valve cover is leaking oil onto the exhaust manifold. When my valve cover was leaking, I sometimes see a waft of smoke from under the hood. And if I have the air on, the smoke would enter the cabin because the air filter is at the base of the windshield.
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