64 12 021 Removing and installing independent/auxiliary heater

WARNING: This page is about a different car, the 2010 BMW 535xi, 2009 BMW 535xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 3 010

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 .

NOTE: DISCONNECT coolant hoses on independent heater.

NOTE: Disconnect fuel line on independent heater with special tool 13 3 010 .

Fig 1: Identifying Special Tool (13 3 010)

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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 note:

Top up coolant and vent cooling system.

Unscrew nut (3).

Fig 2: Identifying Hose Clip, Spring Clips And Nut

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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:

Plug connection (1)
Plug connection (2)

Release screws (3).

Remove independent heater (4) in direction of arrow.

Installation note:

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

Fig 3: Identifying Independent Heater, Muffler, Independent Heater And Screws

Courtesy of BMW OF NORTH AMERICA, INC.