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

Special tools required: 

• 11 7 030
• 11 9 150

Necessary preliminary tasks: 

• Remove ACOUSTIC COVER 
• Release right TIE ROD from steering gear

Installation note: 

If an oxygen sensor is 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.

Remove protective plate over steering gear.

Release screws (1) and remove protective plate (2).

Fig 1: Identifying Oxygen Control Sensor Protective Plate And Screws

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 .

Tightening torque 11 78 1AZ .

Installation note: 

Cable colour black, cylinders 1 to 3.

Fig 2: Removing Oxygen Control Sensor Using Special Tools (11 7 030) And (11 9 150)

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 .

Tightening torque 11 78 1AZ .

Installation note: 

Cable colour grey, cylinders 4 to 6.

Fig 3: Removing Oxygen Control Sensor Using Special Tools (11 7 030) And (11 9 150)

Assemble engine.

Check function of DME control unit.