64 11 206 Removing and installing/renewing heating unit

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety regulations:

Handling R 134a refrigerant See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A
HANDLING REFRIGERANT OIL
INSTRUCTIONS FOR WORKING ON COOLING SYSTEM.

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

NOTE: If A/C system is opened for more than 24 hours:REPLACING DRIER INSERT FOR A/C SYSTEM

Necessary preliminary tasks:

Draw off REFRIGERANT FROM A/C SYSTEM
Remove LOWER SECTION OF MICROFILTER HOUSING
Remove EXPANSION VALVE
Remove INSTRUMENT PANEL TRIM
E9x only: Remove COMPLETE STEERING COLUMN
Disconnect PLUG CONNECTION FOR CONTROL UNIT for Car Access System

E8x only:

Release screws (1).

Tightening torque 32 31 2AZ .

Secure steering column against falling out.

Unfasten screws (2).

Tightening torque 32 31 2AZ .

Fig 1: Identifying Steering Column Screws

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E8x only:

Lower complete steering column (1) until steering wheel rests on driver's seat.

Installation:

Check installation position of sleeve for steering spindle, correct if necessary.

Fig 2: Identifying Lower Complete Steering Column

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WARNING: To avoid injury, cover holder (1) on support tube (2).

Fig 3: Identifying Cover Holder On Support Tube

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Release cover cap (1) from bulkhead (2).

Release screw (1).

Tightening torque 64 11 1AZ .

Fig 4: Releasing Cover Cap From Bulkhead

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Detach right footwell heating duct (1) in area (2) in direction of arrow.

Detach right footwell heating duct (1) with adapter (3) from heater/air conditioner and remove in direction of arrow from right rear compartment heating duct (4).

Fig 5: Removing Right Footwell Heating Duct With Adapter

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NOTE: Lower instrument panel trim partially shown.

Detach left footwell heating duct (1) in area (2) in direction of arrow.

Detach left footwell heating duct (1) with adapter (3) from heater/air conditioner and remove in direction of arrow from left rear compartment heating duct (4).

Fig 6: Removing Left Footwell Heating Duct With Adapter

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Installation:

Make sure retainer (2) is correctly seated on left/right footwell heating duct (1).

Insert footwell heating duct (1) with adapter (3) in rear compartment heating duct (4).

Attach footwell heating duct (1) in area (4) to heater/air conditioner. Make sure assembly is locked exactly at point (5).

Fig 7: Identifying Left Footwell Heating Duct

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Unclip refrigerant lines (2).

Unscrew nuts (2).

Feed out media passage sealing plate (3) and associated rubber grommet.

Installation:

Makes sure media passage sealing plate and associated rubber grommet are correctly seated.

Fig 8: Identifying Footwell Heating Duct, Refrigerant Lines And Nuts

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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:

Bleeding cooling system and checking for water leaks See 1700005 DRAINING AND TOPPING UP COOLANT (N52, N52K, N51, N53) ; 1700009 CHECKING COOLING SYSTEM FOR WATERTIGHTNESS or 1700039 VENTING COOLING SYSTEM AND CHECKING FOR WATER LEAKS (N52/ N52K/ N51/ N53)

Necessary preliminary tasks:

Disconnect all necessary cable ties on support tube.
Release wiring harnesses/cable ducts and lay to one side.
If necessary, remove control units/disconnect plug connections.

Installation:

Make sure wiring harnesses/cable ducts are correctly routed and secured.

Release screw (1) of heater on support tube (2).

Tightening torque 51 71 6AZ .

Fig 9: Identifying Support Tube And Screw

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Detach wiring harness (3) from support tube (2).

Release screws (1) of heater on support tube (2).

Tightening torque 64 11 6AZ .

Fig 10: Identifying Wiring Harness, Support Tube And Screws

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Release nuts (1) on right on support tube (2).

Tightening torque 51 71 5AZ .

Fig 11: Identifying Support Tube And Nuts (Right)

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Release nuts (1) on left on support tube (2).

Tightening torque 51 71 5AZ .

Fig 12: Identifying Support Tube And Nuts (Left)

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Release screw (1) on support tube (2).

Tightening torque 51 71 5AZ .

Fig 13: Identifying Support Tube And Screw

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Release screws (1) on support tube (2) from bracket (3).

Tightening torque 51 71 4AZ .

Detach support tube (2) and remove from vehicle with assistance of a second person.

Fig 14: Identifying Support Tube, Bracket And Screws

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Remove heater.

Installation:

Make sure heater (1) is correctly seated.

Installation:

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

Fig 15: Identifying Condensate Drain And Grommet

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Replacement:

Effective 09/2009, vehicles with SA 606 (Navigation Business) or SA 609 (Navigation Professional) will no longer have ventilation hose (1) on heater (2). In addition, vehicles manufactured up to 09/2009 will no longer require ventilation hose (1) for parts replacement.

Fig 16: Identifying Ventilation Hose On Heater

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