64 11 207 Replacing heater core

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 325Ci, 2005 BMW 325xi, 2005 BMW 325i, 2005 BMW 325Ci, and 2004 BMW 325xi. However, it is still accessible from the selected car via links, so may be relevant.

Remove microfilter housing, refer to 51 71 080 REMOVING AND INSTALLING/REPLACING HEATER BULKHEAD .

Remove panel for instrument panel, refer to 51 45 030 REMOVING AND INSTALLING INSTRUMENT PANEL TRIM .

WARNING: Danger of scalding! Only perform this work after engine has cooled down.

Release hose clamps (1) and (2).

Fig 1: Releasing Hose Clamps

G03166073

Courtesy of BMW OF NORTH AMERICA, INC.

Detach water hoses.

Carefully blow through lines to remove remaining coolant from heating element.

Installation:

Filling and bleeding the cooling system.

Withdraw temperature sensor (1). Unclip wiring harness (2).

Fig 2: Identifying Temperature Sensor And Wiring Harness

G03166074

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and remove bracket (2) from double pipe.

Unclip retainers (3) and lift off cover for heating element (4).

Fig 3: Removing Retainers And Lift Off Cover For Heating Element

G03166075

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

First insert lugs (5).

Remove retainers (1) and remove double pipe (2) towards top.

Fig 4: Removing Retainers And Double Pipe Towards Top

G03166076

Courtesy of BMW OF NORTH AMERICA, INC.

Raise heating element (3) at front and remove.

Installation:

Replace seals.

Coat sealing rings with antiseize agent and ensure correct seating.