11 78 530 Replacing Left Lambda Oxygen Control Sensor (N73)

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NOTE:

For Special Tool identification, see ENGINE- SPECIAL TOOLS .

Special Tools Required:

11 7 030
11 9 150

Cylinders 7 to 12.

Necessary Preliminary Tasks:

Read out DME fault memory.
Remove automatic transmission underbody protection.

WARNING: Scalding hazard! Only perform these tasks after the exhaust system has cooled down.

Plug connection (1), cylinders 1 to 6.

Plug connection (3), cylinders 7 to 12.

Unlock and detach plug connection (3).

Unclip oxygen control sensor cable.

Installation:

Pay attention to cable routing of Lambda control sensor.

Fig 1: Detaching Plug Connections (Left)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove oxygen control sensor (4) with special tools 11 7 030 and 11 9 150.

Installation:

When using special tools 11 7 030 and 11 9 150, 47 N.m on torque wrench scale corresponds to an actual tightening torque of 50 N.m.

If an oxygen control sensor is reused, apply a thin and even coat of Never Seez compound to the thread only.

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 2: Removing Oxygen Control Sensor With Special Tool (Left)

Courtesy of BMW OF NORTH AMERICA, INC.

Check function of DME.