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X1 E84 (2011 - 2015)
First generation BMW X1 availbe as a X1 28i with either sDrive (RWD) or xDrive (AWD) or the US exclusive I6 N55 powered X1 35i xDrive.

 
 
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Old 04-17-2020, 10:50 AM
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stonex1 stonex1 is offline
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Join Date: Oct 2012
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Mein Auto: 13' X1 35i
Fuel leak? or fuel breather?

I finally got my X1 out of the garage from winter storage, but the night before I noticed a fuel gas smell coming from the passenger rear wheel well. It looks like there could be a stain on the inner liner behind the wheel.
There is no other gas smell in the cabin, or engine bay.
There are no signs of leaks anywhere on the ground or anywhere else near the rear suspension.
When I smelled the fuel in the wheel well, I realized the gas cap filler was right there. So I opened up the cap and pssshhhhh. A bunch of pressure released for about 4 seconds. No liquid, just the sound of pressure coming out.
I filled my tank right full before winterizing it in the garage.

I've noticed today that the stain on the wheel well liner is starting to dry up.
Do BMW's have some kind of gas tank breather valve that would release fuel if the pressure built up too much, or have I blown a leak somewhere?

EDIT: checked newtis.info and it does look there is a vent hose part, so I'm hoping that's all it was and some pressure built up and it released some fuel.
Will keep an eye on it to see if it releases or leaks fuel again.
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Last edited by stonex1; 04-17-2020 at 07:28 PM.
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