12 61 285 Replacing engine oil level sensor (N52, N52K, N51, N46, N54, N53)

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection) , see 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary tasks:

Switch off ignition
E60/E63/E64/E83/E85/E86/E70/E71 only: Remove reinforcement plate , see 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE .
E70/E81/E87/E82/E88/E90/E91/E92/E93 only: Remove underbody protection , see 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION .
Drain off engine oil , see 11 00... SERVICE - ENGINE OIL (N54) .

Unlock plug (1) and remove.

Unscrew nuts.

Tightening torque 12 61 2AZ , see 12 61 OIL PRESSURE, OIL TEMPERATURE, OIL LEVEL DISPLAY .

Remove oil level sensor (2).

Fig 1: Identifying Plug And Oil Level Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean sealing face on oil sump.

Replace seal on oil level sensor.

An excessively low torque value will result in oil leaks.

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.

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

Courtesy of BMW OF NORTH AMERICA, INC.

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!