6411208 Replacing heat exchanger

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335xi, and 2010 BMW 335i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Determine manufacturer of installed heat exchanger (Denso or Behr) before ordering spare parts!
Remove TRIM PANEL FOR PEDAL ASSEMBLY .

Installation:

Up to 12/2009 pipes must be replaced as well!

From 01/2010 pipes are automatically integral parts of the repair kit!

Fig 1: Installing Heat Exchanger

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Necessary preliminary tasks

Remove HEATER

Release screws (1).

Slide rubber grommet (1) with foam seal forward slightly.

Carefully feed pipe holder (3) with pipes (4) past rubber grommet (2).

Installation:

If necessary, replace rubber grommet (1) and/or foam seal.

Make sure rubber grommet (1) is correctly seated on pipe holder (3).

Fig 2: Sliding Rubber Grommet With Foam Seal Forward

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If necessary, remove coolant hose (2).

Release screws (3) and remove cover.

NOTE: Diesel version only:
Unfasten plug connection (1) and disconnect.

Withdraw electric auxiliary heater (4) in direction of arrow.

Fig 3: Removing Heat Exchanger From Heater/Air Conditioner

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Remove heat exchanger (5) from heater/air conditioner (6).

Release screws (1) and slide screw clamps (2) forwards slightly.

Remove pipes (3) from heat exchanger (4).

Installation:

Replace sealing rings.

Use special tool 00 9 030 WEDGE to mount sealing rings without damaging them.

Fig 4: Sliding Screw Clamps

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IMPORTANT: Inflow connection (3) may only be positioned at the bottom.
When installing, make sure that the return-flow connection (2) (larger opening) marked with a black dot (1) is positioned at the top.
Inflow connection (3) accordingly may only be positioned at the bottom.

Fig 5: Identifying Return-Flow Connection With Black Dot

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