64 11 208 Replacing Heater Core

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

Determine manufacturer of installed heater (Denso or Behr) before ordering spare parts!

Remove trim panel for pedal assembly . Refer to 51 45 185 REMOVING AND INSTALLING/REPLACING PANEL FOR PEDALS (Coupe) and/or 51 45 185 REMOVING AND INSTALLING/REPLACING PANEL FOR PEDALS (Convertible).

Fig 1: Identifying Manufacturer Label

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Necessary preliminary tasks:

Remove heater/air conditioner . Refer to 64 11 206 Removing and Installing/Replacing 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: Identifying Rubber Grommet, Pipe Holder & Pipes

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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.

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

Fig 3: Identifying Heater, Heater/Air Conditioner, Plug Connection & Screws

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

Remove pipes (3) from heater core (4).

Installation:

Replace sealing rings.

Coat sealing rings with antiseize agent.

Make sure sealing rings are correctly seated.

Fig 4: Identifying Pipes, Screw Clamps & Heater Core

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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 & Black Dot

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