From model '83
FUEL SUPPLY LAYOUT - BMW 735 i

1 Fuel intake with transfer pump
2 Fuel level transmitter
3 Fuel feed
4 Fuel return
5 Expansion tank
6 Vent line
7 Charcoal canister (underneath battery console)
8 To air cleaner
9 Damping tank
10 Fuel delivery pump
11 Fuel filter

73016051 - click to zoom