Necessary preliminary work

• Switch off ignition
• only E60, E61, E63, E64, E83, E85, E86, E70, E71: 

  Remove reinforcement plate

• only E70, E81, E87, E82, E88, E90, E91, E92, E93: 

  Remove UNDERBODY PROTECTION

• Drain off engine oil  See 0000610 SERVICE - ENGINE OIL (PETROL VEHICLES FROM 03/2007 TO 08/2008) or 1100... SERVICE - ENGINE OIL (N51)

Release connector (1) and remove.

Unscrew nuts.

Tightening torque 12 61 2AZ .

Remove oil level sensor (2).

Installation note: 

Clean sealing surface on oil sump.

Replace gasket on oil level sensor.

An excessively low torque value will result in oil leaks.

Fig 1: Identifying Oil Level Sensor Ang Plug

Courtesy of BMW OF NORTH AMERICA, INC.

An excessively high torque value will result in damage to the oil level sensor.

Top up engine oil.

Only if the holder for earth strap is installed! 

Absolutely reinstall the holder (1) with the earth strap (2)!

Tighten earth strap (2) with screws (3) between the holder and cable clip on the gearbox.

Tightening torque 12 52 1AZ .

If the holder with earth strap is not reinstalled, it can lead to an operating failure of the oil level sensor!

Fig 2: Identifying Oil Level Sensor Earth Strap, Holder And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Top up engine oil.

Screw on oil filter cover tightly.