13 71 170 Removing and installing/replacing rear air duct (N54, N54T)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Risk of damage through lever action at the top on the air duct!
Air duct may break!

Necessary preliminary tasks:

Remove intake air manifold . See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N54) .
Remove transmission . See AUTOMATIC TRANSMISSION - REPAIR or MANUAL TRANSMISSION - REPAIR article.

Unlock and disconnect line (1).

Unlock connector (2) and remove.

Release quick-connect coupling (3) by turning lock and detach.

Fig 1: Identifying Quick-Connect Coupling And Connector

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Installation:

Turn lock (1) until arrow markings are flush.

Fig 2: Turn Lock (1) Until Arrow Markings Are Flush

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IMPORTANT: Do not detach air duct in upward direction.
Risk of damage!
Air duct may break!

Release screw (1).

Tightening torque, see 13 71 3AZ .

Release screw (2) and remove bracket (3).

Tightening torque, see 13 71 8AZ .

NOTE: Illustration with engine removed.

Fig 3: Identifying Bracket And Screw

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Pull off air duct (1), feed out and remove.

NOTE: Illustration with engine removed.

Fig 4: Pulling Off Air Duct

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Installation:

Check sealing ring (1) for damage.

Replace damaged sealing ring.

Make sure sealing ring (1) is correctly seated in air duct (2).

Fig 5: Identifying Sealing Ring And Air Duct

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