64 11 206 Removing and installing/renewing heating unit

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant fluid.
Read and comply with safety instructions:

Handling R 134a (tetrafluorethane) refrigerant . See 64 50... NOTE FOR HANDLING R134A REFRIGERANT or 64 50... SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A
HANDLING REFRIGERANT OIL

IMPORTANT: Risk of damage!
Restart engine only when the air conditioning system has been correctly filled.

NOTE: If the air conditioning system is open for longer than 24 hours: replace DESICCANT INSERT FOR AIR CONDITIONING

Necessary preliminary tasks:

Draw off AIR CONDITIONING SYSTEM
Remove SUPPORT FOR DASHBOARD
Remove expansion valve . See 64 51 520 REMOVING AND INSTALLING/REPLACING EXPANSION VALVE (N55, N47) or 64 51 520 REMOVING AND INSTALLING/REPLACING EXPANSION VALVE (N20, N57)

NOTE: Diesel vehicles only:

Disconnect positive line (1) and plug connection (2) at electric auxiliary heater (3)

Fig 1: Identifying Electric Auxiliary Heater Plug Connection And Positive Line

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Diesel vehicles only:

Fold back carpet in area (2).

Slacken nut (1).

Take off grounding cable (3).

Fig 2: Folding Back Carpet

Courtesy of BMW OF NORTH AMERICA, INC.

Release plug connection (1) at blower motor (2) and disconnect.

Fig 3: Identifying Blower Motor Plug Connection

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IMPORTANT: Make sure remaining coolant is removed completely.

Carefully blow through aluminum double pipe to remove remaining coolant from heat exchanger for heating system.

Installation note:

Vent cooling system and check on watertightness. See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT , 17 00 009 CHECKING COOLING SYSTEM FOR WATERTIGHTNESS , 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N55) or 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATERTIGHTNESS (N20) .

IMPORTANT: Risk of soiling by leaking coolant!

Remove heating and air-conditioning unit (1) from vehicle.

Installation note:

Make sure that blower housing (2) and sealing plates for media openings (4) in bulkhead (5) are fitted correctly.

Footwell ventilation ducts (3) must be fitted correctly in the corresponding connection piece (3).

Fig 4: Identifying Heating And Air-Conditioning Unit, Blower Housing, Ventilation Ducts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Mat (3) under the heating and air-conditioning unit must be correctly positioned and bonded onto the carpet.

Make sure condensate drain (1) is correctly seated on grommet (2) (see next operation).

Fig 5: Identifying Condensate Drain Seated On Grommet

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of water damage in the passenger compartment!

Installation note:

Before mounting the heater (2), spray grommet (1) with lubricant G13 (sourcing reference from BMW Parts Department).

Make sure condensate drain (2) is correctly seated on grommet (1).

Perform a visual inspection after installing the heater (2).

Fig 6: Identifying Heater And Spray Grommet

Courtesy of BMW OF NORTH AMERICA, INC.