11 78 545 Removing and installing/replacing both oxygen monitoring sensors

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

WARNING:

Scalding hazard!

Work should only be carried out on an exhaust system that has cooled down.

Necessary preliminary tasks:

Remove REAR UNDERBODY PROTECTION .

Installation note:

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 oxygen monitor sensor.

Release monitor sensor (1) with special tools 11 7 030 and 11 9 150 .

IMPORTANT:

When using special tool 11 7 030 in conjunction with special tool 11 9 150 , it is essential to reduced the prescribed tightening torque by 3 Nm.

Tightening torque: 11 78 1AZ .

Installation note:

Cable color black, cylinders 1 to 3.

Fig 1: Releasing Monitor Sensor With Special Tools (11 7 030) And (11 9 150)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Release insulation (2) in direction of arrow.

Disconnect plug connection for oxygen monitor sensor.

Release monitor sensor (1) with special tool 11 7 020.

Tightening torque: 11 78 1AZ .

Installation note:

Cable color gray, cylinders 4 to 6.

Fig 2: Releasing Insulation

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.