11 78 513 Replacing Both Lambda Oxygen Control Sensors (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to ENGINE- SPECIAL TOOLS .

11 7 030
11 9 150

WARNING: Scalding hazard!
Work should only be carried out on an exhaust system that has cooled down.

Necessary preliminary tasks:

Remove acoustic cover . See 11 00 REMOVING AND INSTALLING/REPLACING IGNITION COIL COVER (N54) .
Remove MICROFILTER HOUSING .
Remove front underbody protection (not M3).

NOTE: It is not necessary to conduct a chassis/wheel alignment check when the tie rod is released.

Release EAR CLIP (1). Pull off gaiter (2) from the track rod (3).

Pull off gaiter (2) from the track rod (3).

Fig 1: Detaching Gaiter From Tie Rod

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: It is not necessary to conduct a chassis/wheel alignment check when the track rod is released.

IMPORTANT: To avoid damage to rack and to suspension mounting, move rack in as far as possible.

Undo the joint (1) using special tools 32 3 160 at the steering box rack.

Fig 2: Identifying Steering Gear Rack Joint

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 32 21 1AZ .

Installation:

If an oxygen sensor is to be reused, only apply a thin and uniform coat of Never Seez Compound (refer to BMW Parts Service) to thread.

The part of the oxygen control 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 control sensor, cylinders 1 to 3.

Release oxygen control 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. See 11 78 1AZ in EMISSION CONTROL OXYGEN SENSOR .

Installation:

Cable color black, cylinders 1 to 3.

Fig 3: Identifying Special Tool 11 7 030 And 11 9 150

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection for oxygen control sensor, cylinders 4 to 6.

Release oxygen control 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. See 11 78 1AZ in EMISSION CONTROL OXYGEN SENSOR .

Fig 4: Releasing Oxygen Control Sensor Using Special Tools 11 7 030 And 11 9 150

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Cable color grey, cylinders 4 to 6.

Assemble engine.

Check function of DME control unit.