12 61 285 Replacing level switch for engine oil

Necessary preliminary tasks:

Switch off ignition.
Unfasten oil filter cover to enable engine oil in filter to flow back into the oil pan.
Remove underbody panelling.
If necessary, remove reinforcing plate.
Drain engine oil.

Disconnect plug connection (1).

Unscrew nuts (2).

Remove level switch (3).

Fig 1: Disconnecting Oil Level Switch Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean sealing face on oil sump.

Replace seal on level switch.

Installation:

Top up engine oil.

Screw on oil-filter cover tightly.