18 32 050 Removing and installing/replacing catalytic exhaust-gas converter for cylinders 1-3 (N54)

WARNING: This page is about a different variant/trim than selected.

WARNING: Scalding hazard!

Only perform these tasks after exhaust system has cooled down.

Necessary preliminary tasks

NOTE: The oxygen sensors are in danger of being damaged when the catalytic exhaust-gas converters are removed and installed.

Remove CONTROL SENSOR , cylinders 1 to 3.

Remove MONITOR SENSOR from cylinders 1 to 3.

Release screws (1).

Remove guard plate (2).

Fig 1: Locating Nuts

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Unscrew nuts (1).

Tightening torque 18 20 2AZ .

Fig 2: Locating Nuts

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Release screws and remove holder (1).

Replace aluminium screws.

Tightening torque, manual gearbox 23 00 2AZ .

Fig 3: Identifying Holder Screws

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Release clamp. Clamp must be replaced each time it is released.

Tightening torque 18 31 3AZ .

In so doing, secure catalytic converter (1) against falling out.

Feed out catalytic converter (1) and remove.

Fig 4: Identifying Catalytic Converter

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Installation:

Clean sealing face. Replace seal and clamp.

Align catalytic converter to exhaust system connecting piece and tighten down.

Add final details to vehicle.

Check exhaust system for leaks.