Diesel engine fuel supply systems
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
Fuel system
The fuel is delivered from the fuel tank by the fuel pump via the feed line to the high pressure pump. The fuel pump delivers more fuel than the engine requires. A return line is required.
Tank-venting system
Diesel fuel is slow-evaporating, therefore no carbon canister is required. The fuel tank is bled directly into the atmosphere.