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[Roymondo]

Looks like could be cnnector for item 6 in pic, it would be in that area (fuel tank breather valve) http://www.ascycles.com/Illustrated...Charcoal Filter/FUEL VENTILAT&bindCat=16_0787 and like previously mentioned is prob US market only

That'll be the kiddie - This is the elctrical connector end of it: http://c1552172.r72.cf0.rackcdn.com/227059_x800.jpg

 

[Roymondo]

Is this basically a carbon adsorbsion/absorbtion(??) unit that scrubs fule vapour as the fuel in the tank expands and when the level drops the tank breaths through the carbon reclaiming the the fuel?

If so the BMW committee for extreme uber complication have earned their corn with that one.

Wonder what it does to the MPG figures...

They are not BMW-specific - Such systems/canisters are commonly fitted to petrol engined cars sold in the US (where I think they, or a similar system, are a legal requirement in some States).

 

[GBDamo]

fully accept it's the law in the States but FFS...really

 

[Bendy toy]

The carbon canister is to absorb fuel vapours escaping from the tank air vent. In hot climates with strong sunlight these fumes cause the nasty smogs. They emit continuously so can be worse than exhaust emissions which at least have burnt away most of the hydrocarbons and emit only when the engine is running.
Oh great another tree hugger. Maybe, but if unfiltered fuel tank emissions really are as bad as the regs imply it would need a little more than a crummy coke can size canister.
IMO it's another greenwash solution to a (nearly) non existent problem.


Sent from my phone with mangled spelling