11 78 510 Replacing Oxygen Control Sensors (N55)

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Special Tools Required:

11 7 030
11 9 150

WARNING: Risk of Burning!
Work Should Only Be Carried Out On An Exhaust System That Has Cooled Down.

Installation Note:

The Threads of New Oxygen Control Sensors Are Already Coated with Never-Seez Compound (Refer To BMW Parts Department).

If An Oxygen Control Sensor Is To Be Reused, Apply A Thin and Even Coating of Never-Seez Compound To The Thread Only.

The Part of The Lambda Control Sensor Which Projects Into The Exhaust Branch (Sensor Ceramics) Must Not Be Cleaned and Not Coated with Lubricant.

Necessary Preliminary Tasks:

Remove REAR ENGINE GUARD .
Remove AIR DUCT .

Disconnect Plug Connection On Oxygen Control Sensor (1).

Installation Note:

Cable Color of Oxygen Control Sensor = Black.

Cable Color of Oxygen Monitoring Sensor = Grey.

Fig 1: Identifying Plug Connection On Oxygen Control Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Release Oxygen Control Sensor (1) with Special Tools 11 7 030 and 11 9 150 with A Suitable Extension (2).

Tightening torque 11 78 1AZ .

IMPORTANT: When Using Special Tool 11 7 030 In Conjunction with Special Tool 11 9 150, It Is Essential To Reduce The Prescribed Tightening torque By 3 Nm.

Fig 2: Releasing Oxygen Control Sensor Using Special Tools and Extension

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble The Vehicle.

Check Function of DME.