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Looking for BMW part number and info for the S-shaped "trunk vent tubes". Where do they install? Do they actually vent the trunk or is the description inaccurate? Can they possibly be the source of exhaust fumes into the passenger compartment? Any and all advice is welcome. Thanks.

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Are you referring to the small diameter vent tubes that vent the gas tank and eminate from the rubber filler neck-to-tank connector, or the much larger vent tubes that exhaust air from the flow-through ventilation slots directly above the back window?  FYI these tubes are not used on sunroof cars, and are replaced with grey plastic plugs.  

 

A little more info and we can help you.

 

cheers

mike

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Not responsible for exhaust fumes in the passenger compartment. Those tubes are for stale air scavenging from the passenger compartment on non sunroof cars. I find that exhausty fumes in the cabin are usually from oil leaks onto the exhaust manifold, either from a leaking valve cover gasket, leaking distributor o-ring or housing gasket, or oil weeping from the exhaust studs. 

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Those fumes can also be sucked into the trunk from the tailpipe (low pressure area due to the flat backside of a 2002).  This happens when the trunk lid gasket is worn/missing/cracked and/or the trunk lid isn't adjusted so that it closes tightly.  Fumes once inside the trunk can enter the passenger compartment from small gaps in the upper corners of the panel separating trunk from back seat (look for foam stuffed into these corners that's rotted) and from speaker holes cut in the package shelf.  They should be closed up and surface mounted speakers installed.

 

cheers

mike

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