11 78 613 Replacing Both Oxygen Monitor Sensors (S54)

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Special Tools Required:

11 7 020
11 7 030
11 9 150

Refer to 13 00 002 CHECKING FUNCTION OF DIGITAL ENGINE ELECTRONICS (DME) .

US Version:

In the US version, the oxygen monitor sensors are installed in the exhaust manifolds.

Cylinders 1 to 3: Release monitor sensor with special

tool 11 9 150 in conjunction with special tool 11 7 030 and tighten down.

Installation:

When special tool 11 9 150 is used in conjunction with special tool 11 7 030, 47 N.m on the torque wrench dial corresponds to an actual tightening torque of 50 N.m.

Cylinders 4 to 6: Release monitor sensor with special tool 11 7 020 and tighten down.

Tightening torque, refer to 11 78 1AZ in ENGINE - TIGHTENING TORQUES .

ECE Version:

Remove catalytic converter. Refer to 18 32 005 REMOVING AND INSTALLING/REPLACING CATALYTIC CONVERTER (S54) .

Unclip oxygen monitor sensor cable from holder.

To release and tighten down oxygen monitor sensors (1), use special tool 11 7 020 or special tool 11 7 030.

Tightening torque, refer to 11 78 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 1: Locating Oxygen Monitor Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

The threads of new oxygen monitor sensors are already coated with Never Seez Compound.

If an oxygen monitor sensor is used again, apply a thin and even coat of Never Seez Compound to the thread only.

Do not clean that part of the oxygen sensor which projects into the exhaust system branch and do not allow it to come into contact with lubricants.

Cover oxygen monitor sensor when applying underseal. Pay attention to cable routing for oxygen monitor sensor.