64 11 208 Replacing heater core

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2008 BMW 335xi, 2008 BMW 335i, 2008 BMW 328xi, 2008 BMW 328i, and 2008 BMW 323i. 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 .

Fig 1: Identifying Manufacturer Identification Mark On Heater

G04727804

Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks:

Remove Heater/Air Conditioner

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 Heater Mounting Screws, Rubber Grommet, Pipe Holder, And Pipes

G04727805

Courtesy of BMW OF NORTH AMERICA, INC.

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 Plug Connection, Electric Auxiliary Heater, Coolant Hose And Screws

G04727806

Courtesy of BMW OF NORTH AMERICA, INC.

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 Retaining Screws, Screw Clamps, Pipes And Heater Core

G04727807

Courtesy of BMW OF NORTH AMERICA, INC.

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 Black Dot And Flow Connections

G04727808

Courtesy of BMW OF NORTH AMERICA, INC.