Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 740i, 2015 BMW 740Li, and 2014 BMW Alpina B7L. However, it is still accessible from the selected car via links, so may be relevant.

DRAW OFF FUEL
REMOVE REAR SEAT
Vehicles with comfort seat:
Remove right REAR SEAT
Remove flange cover See 1614200 REMOVING AND INSTALLING/REPLACING FLANGE COVER (OUTER FUEL FILTER) or 1614200 REMOVING AND INSTALLING/REPLACING FLANGE COVER

NOTE: Picture does not show the fuel tank outer skin.

Unclip connecting line for level sensor (2) through service opening (1).

Disconnect plug connector for level sensor (3) from plug connector installation unit on left (4).

Fig 1: Identifying Fuel Level Sensor, Service Opening, Plug Connector And Installation Unit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Picture does not show the fuel tank outer skin.

Unlock tab (3) in upward direction through service opening (1) and lift out level sensor (2).

Installation:

Level sensor (2) must audibly snap into place.

Fig 2: Unlocking Fuel Sensor Tab In Upward Direction Through Service Opening

Courtesy of BMW OF NORTH AMERICA, INC.