11 78 545 Removing and installing/replacing both lambda oxygen monitor sensors (N52)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2008 BMW Z4, 2007 BMW Z4, 2007 BMW 530xi, 2007 BMW 530i, and 2007 BMW 525xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 4 260

WARNING: Scalding hazard!

Only perform these tasks after the exhaust system has cooled down.

Necessary preliminary tasks:

Remove engine splash guard.
Remove Exhaust System. .

Installation:

If an oxygen sensor is to be reused, only apply a thin and uniform coat of Never Seez Compound to thread.

The part of the oxygen monitor sensor which projects into the exhaust system branch (sensor ceramic) must not be cleaned or come into contact with lubricant.

Disconnect plug connection for lambda monitor sensor. Release monitor sensor (1) with special tool 11 4 260.

For tightening torque refer to 11 78 1AZ in 11 78 EMISSIONS CONTROL, CONTROL SENSOR / MONITOR SENSOR (N52) .

Installation:

Cable colour black, cylinders 1 to 3.

Fig 1: Identifying Special Tool (11 4 260) And Monitor Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: To remove the monitor sensor for cylinders 4 to 6, it is necessary to remove the exhaust system.

Disconnect plug connection for lambda Monitor Sensor.

Release monitor sensor (1) with special tool 11 4 260.

For tightening torque refer to 11 78 1AZ in 11 78 EMISSIONS CONTROL, CONTROL SENSOR / MONITOR SENSOR (N52) .

Installation:

Cable colour gray, cylinders 4 to 6.

Fig 2: Identifying Special Tool (11 4 260) And Monitor Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.