11 78 613 Replacing both lambda oxygen monitor sensors (N54)

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.

Special tools required:

11 7 020
11 7 030
11 9 150

See ENGINE - SPECIAL TOOLS (N54, N63) .

WARNING: Scalding hazard!

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

Necessary preliminary tasks:

Remove rear UNDERBODY PROTECTION .
Remove EXHAUST SYSTEM .

Installation:

The threads of new lambda control/monitor sensors are already coated with Never Seez Compound.

If a lambda control/monitor sensor is to be reused, apply a thin and even coating of Never Seez Compound to the thread only.

The part of the lambda control/monitor sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.

Unlock and disconnect plug connection for oxygen monitor sensor, cylinders 1 - 3.

Installation:

Plug connection must snap audibly into place!

Release oxygen 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 , see EMISSION CONTROL

Fig 1: Identifying Oxygen Monitor Sensor And Special Tools (11 7 030, 11 9 150)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Cable color black for oxygen monitor sensor (1), cylinders 1 - 3.

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

Unlock and disconnect plug connection for oxygen monitor sensor, cylinders 4 - 6.

Installation:

Plug connection must snap audibly into place!

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

Tightening torque 11 78 1AZ , see EMISSION CONTROL

Installation:

Cable color grey for oxygen monitor sensor (1), cylinders 4 - 6.

Fig 2: Identifying Oxygen Monitor Sensor And Insulation

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME control unit.