18 00 020 Removing and installing complete exhaust system (M57T2 with SCR)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

WARNING: Risk of burning!
Only perform this work after engine has cooled down.
Danger of injury!
Removal of the exhaust system must be carried out with the assistance of a second person.

Support exhaust system with jack and special tool 31 2 220 .

Fig 1: Supporting Exhaust System Using Tool

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Unscrew nuts (1).

Replace self-locking nuts.

Replace gasket.

Tightening torque: 18 31 5AZ .

Fig 2: Identifying Self-Locking Nuts

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Unfasten nitrogen oxide sensor (1) using special tool 11 7 030 .

Tightening torque: 18 31 2AZ .

Installation note:

If a nitrogen oxide sensor is reused, apply a thin coating of Never-Seez compound to thread only.

Do not clean the sensor section which protrudes into the exhaust branch and ensure that it avoids all contact with lubricants.

Fig 3: Identifying Nitrogen Oxide Sensor

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Release bolt and remove holder (1).

Tightening torque: 18 31 8AZ .

Fig 4: Locating Bolt Of Holder

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Release screws and remove holder with suppression line.

Tightening torque: 18 31 9AZ .

NOTE: Refer to Fig 5, illustration shows the left side. The procedure is identical for the right side.

Carefully lower exhaust system with assistance of a second person.

Fig 5: Locating Screws Of Suppression Line

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Installation note:

Check rubber mounts for damage. Replace damaged rubber mounts.

Check exhaust system for leak tightness.