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Home >> BMW >> 2009 >> X5 48i >> Repair and Diagnosis >> External Pages >> Different car >> Section 375 (Heating & Air Conditioning - Repair) >> Auxiliary Heater with Control Elements >> 64 12 021 Removing and installing independent/auxiliary heater >> Removal & Installation

Removal & Installation

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Necessary preliminary tasks: 

WARNING: Danger of scalding!
Only perform the following tasks on an engine that has cooled down.
Follow instructions for working on cooling system. See 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .
NOTE: Disconnect coolant hoses on independent heater.
NOTE: Disconnect fuel line on independent heater with special tool 13 3 010.
Fig 1: Disconnecting Fuel Line On Independent Heater
G03262427Courtesy of BMW OF NORTH AMERICA, INC.

Recycling: 

Fuel escapes when fuel line is detached. Have a suitable collecting container ready.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Release hose clip (1) and detach fuel line.

Release spring clips (2) and detach coolant hoses.

Installation: 

Top up coolant and vent cooling system. See 17 00 005 DRAINING OFF AND TOPPING UP COOLANT .

Unscrew nut (3).

Fig 2: Releasing Spring Clips And Detach Coolant Hoses
G03262428Courtesy of BMW OF NORTH AMERICA, INC.
WARNING: Secure independent heater against falling out.

Disconnect plug connections (1) and (2).

IMPORTANT: To avoid damaging the independent heater, it is absolutely essential to adhere to the following connecting sequence for the plug connections during installation:
  1. Plug connection (1)
  2. Plug connection (2)

Release screws (3).

Remove independent heater (4) in direction of arrow.

Installation: 

Make sure exhaust pipe of independent heater (4) is correctly seated in muffler (5).

Fig 3: Identifying Exhaust Pipe Of Independent Heater
G03262429Courtesy of BMW OF NORTH AMERICA, INC.