11 78 513 Replacing both oxygen control sensors (N54, N54T)

Special tools required:

11 7 030
11 9 150
32 3 160

WARNING: Risk of burning!
Work should only be carried out on an exhaust system that has cooled down.

Necessary preliminary tasks

Remove IGNITION COIL COVER .
Remove MICROFILTER HOUSING .
Remove front underbody protection (not M3).

Release EAR CLIP (1).

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

Fig 1: Pulling Off Gaiter From Track 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.

Fig 2: Removing Joint Using Special Tools 32 3 160 At Steering Box Rack

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque: 32 21 1AZ .

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 control sensor which projects into the exhaust system branch (sensor ceramic) must not be cleaned or come into contact with lubricant.

Fig 3: Removing Oxygen Control Sensor With Special Tools 11 7 030 And 11 9 150

Courtesy of BMW OF NORTH AMERICA, INC.

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 reduce the prescribed tightening torque by 3 Nm.

Tightening torque: 11 78 1AZ .

Installation note:

Cable color black, cylinders 1 to 3.

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 reduce the prescribed tightening torque by 3 Nm.

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

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 11 78 1AZ .

Installation note:

Cable color grey, cylinders 4 to 6.

Assemble engine.

Check function of DME control unit.