Necessary preliminary tasks

• Drain COOLANT from radiator
• Remove FRONT LEFT WHEEL ARCH TRIM

Disconnect plug connection (1).

Fig 1: Identifying Plug Connection

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Disconnect coolant hoses (1) and catch coolant in a suitable container.

Release screw (2).

Tightening torque 64 12 3AZ .

Release fuel line (3) and catch escaping fuel in a suitable container.

Release nuts (4) and remove complete independent heater bracket.

Tightening torque 64 12 1AZ .

Fig 2: Identifying Coolant Hoses, Fuel Line, Screw And Nuts

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When replacing independent heater without bracket: 

Unclip retainer of intake silencer.

Turn metal tube (1) clockwise and remove intake silencer.

Release screws (2) and remove silencer (3).

Tightening torque 64 12 1AZ .

Install fuel intake line with filter.

Fig 3: Identifying Intake Silencer, Metal Tube And Screws

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Remove coolant hoses (1) and feed out of bracket.

Installation: 

Risk of damage! 

Make sure abrasion guard (2) is correctly seated.

Fig 4: Identifying Coolant Hoses And Abrasion Guard

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Disconnect plug connection (1).

Release screws (2) and remove independent heater from bracket (3).

Tightening torque 64 12 4AZ .

Fig 5: Identifying Plug Connection And Screws

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Independent heaters many only be operated with the associated fuel pump.

In the event of incorrect installation, fuel can escape and black smoke can be issued when the independent heater is started.

Because of different build dates, installed fuel pumps must be checked.

Read out the heater number via the BMW DIS system and use this number to determine the associated fuel pump from the table below.

Determine fitted fuel pump model and if necessary install new FUEL PUMP .

Component allocation:

After installation: 

• VENT COOLING SYSTEM