Auxiliary Cabin Heater: Service and Repair

64 12 160 - Removing and installing or replacing complete independent heater with bracket





Warning!
Scalding hazard!
Work on independent heating may only be carried out when it has cooled down.





Recycling
Fuel escapes when fuel lines are detached. Have a suitable collecting container ready.
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.





Necessary preliminary tasks:
- Drain coolant from radiator
- Remove front left wheel arch trim





Note:
For purposes of clarity, graphic shows front bumper removed.

Disconnect plug connection (1).





Disconnect coolant hoses (1) and catch coolant in a suitable container.
Release screw (2).
Tightening torque 64 12 3AZ Independent Heater.
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 Independent Heater.





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 Independent Heater.
Install fuel intake line with filter.





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

Installation Note:
Risk of damage!
Make sure abrasion guard (2) is correctly seated.





Disconnect plug connection (1).
Release screws (2) and remove independent heater from bracket (3).
Tightening torque 64 12 4AZ Independent Heater.






Warning!
Diesel vehicles only:
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 Service and Repair.

Component allocation:










After installation:
- Vent cooling system