11 78 510 Replacing both oxygen control sensors (S54)

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 7 030
11 9 150

For identification of special tools, refer to ENGINE- SPECIAL TOOLS .

(for work step number 13 00 002)

Read out fault memory, clear if necessary.

Remove hose (1) for engine vent.

Remove sealing cap (2).

Remove ignition coil cover.

Fig 1: Removing Hose For Engine Vent And Sealing Cap

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The plug housings of the oxygen sensors for cylinders 1 to 3 and 4 to 6 are different.

Unclip plug housing (1) from mounting.

Fig 2: Unclipping Plug Housing From Mounting

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connections of oxygen sensors.

Feed oxygen sensor cables out of shield plate of exhaust manifold.

Fig 3: Releasing Oxygen Sensor Cables

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clip cables of oxygen sensors into mounts on shield plate of exhaust manifold.

CAUTION: Ensure cables are exactly routed.

Remove underbody protection.

The oxygen sensors for cylinders 1 to 3 and 4 to 6 are different.

Mark oxygen sensors so as not to mix sensors up at a later stage.

Detach oxygen sensors with special tool 11 7 030 in conjunction with special tool 11 9 150.

Fig 4: Detaching Oxygen Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Remove oxygen sensor from cylinders 1 to 3.
Remove oxygen sensor from cylinders 4 to 6.

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.

Installation:

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

For final tightening of oxygen sensors, fit torque wrench and special tool (11 7 030/11 9 150) as illustrated.

Fig 5: Tightening Oxygen Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque, 11 78 1AZ. Refer to 11 78 EMISSIONS-CONTROL, LAMBDA OXYGEN SENSOR .

Install oxygen sensor for cylinders 4 to 6 and tighten down.
Install oxygen sensor for cylinders 1 to 3 and tighten down.

Cover oxygen sensors when applying underseal.

Pay attention to cable routing for oxygen sensors.