13 90 500 Replacing tank vent valve (M62): Installation:

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Push hose (3) onto tank venting valve until locking ring (2) can clearly be heard snapping into place.

Fig 1: Pressing Locking Ring And Detach Hose From Tank Venting Valve

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NOTE: Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Now clear the fault memory.