11 78 545 Removing and Installing/Replacing Both Lambda Oxygen Monitor Sensors (N54)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 BMW 335xi, 2010 BMW 335i, 2009 BMW 335xi, 2009 BMW 335i, and 2008 BMW 335xi. 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

WARNING:

Scalding hazard!

Only perform these tasks after the exhaust system has cooled down.

Necessary preliminary tasks:

Remove engine splash guard.

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 monitor 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 monitor sensor.

Release monitor sensor (1) with special tools 11 7 030 and 11 9 150. (See 11 7 030 SOCKET WRENCH SOCKET WAF 22 and 11 9 150 SPECIAL WRENCH )

Tightening torque, see 11 78 1AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Installation:

Cable color black, cylinders 1 to 3.

Fig 1: Identifying Special Tools (11 7 030 & 11 9 150) On Monitor Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

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

Disconnect plug connection for oxygen monitor sensor.

Release monitor sensor (1) with special tool 11 7 020. (See 11 7 020 SOCKET WRENCH SOCKET WAF 22 )

Tightening torque, see 11 78 1AZ in ENGINE -- TORQUE SPECIFICATIONS -- TWIN TURBO

Installation:

Cable color gray, cylinders 4 to 6.

Fig 2: Identifying Special Tools (11 7 020) On Monitor Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.