Need help identifying hard fuel line

[AutoBond]

Hello! I'm in the process of replacing a rusty fuel tank and need help identifying a hard fuel line. I looked on Real Oem under fuel supply and can't seem to locate it. Attached are some photos. It starts at the top of the fuel tank and extends all the way to the front of the car. When I took the hose off there was some rust on the inside of the line, so I feel like I need to replace it. Could someone tell me what part this is and function? Thanks!

[mlytle]

vapor return line? item #11 here.

https://www.realoem.com/bmw/enUS/sho...diagId=16_0107

where does it end in the engine compt? left wing near vapor canister?

[AutoBond]

Thanks for the reply! It does end in the engine compartment. Here is a photo. Vapor return line would make sense since I know where the feed line and return lines are.

[AutoBond]

The vapor return line in the search results looks just like the part. Mystery solved. Thank you very much!!

[mlytle]

[hardtailer]

that little bit of rust won't do any harm so best to keep that hardline right there where it is. IMHO that is...

[fitswell]

IMO best to replace while tank is out. It will be a bear to do this once everything is back together.

[808M]

I chased fueling issues on and off for the better part of two years before finding out the hard lines were rusting from the inside out — Probably due to e10. I changed the whole fueling system except the tank before realizing it was the lines. I would change them.