Fuel pump injects fuel into the engine. My 2007 335i has a strong smell. Bmw N54 Hpfp Failure Symptoms Codes Youtube I was thinking rear end or maybe a seal. 2007 bmw 335i gas smell . A lot of 2007 2008 335i has been through our shop for the same symptoms. Also no change. No leaks on the floor or gas in the gas cap area. Open the hood and look at the area around the oil cap if you notice oil and debris collecting on the valve cover just below the oil cap most likely the o ring is worn out and is leaking causing fumes from the engine which smell like gas to leak out and be drawn into the hvac heating ventilation air conditioning fresh air intake located directly below the windshield. The hpfp system transfers the fuel through injectors right into the engine. The 8 most common bmw n54 135i 335i 535i engine problems. So i smelled a strong smell of fuel in my garage and narrowed it down from near the driver side top of the rear wheel on my 335i i pulled the cover from...
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