64 12 500 Removing and installing or replacing complete heater

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

All:

Disconnect plug connections (1) to (3).

CAUTION: To avoid damage during installation, it is absolutely essential to adhere to the following contacting sequence for the plug connections:

Plug connection (1).
Plug connection (2).
Plug connection (3).

Fig 1: Identifying Plug Connections

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Unfasten hose clip (1).

Detach intake hose (3) in direction of arrow from heater (2).

Release screws (4).

Fig 2: Detaching Intake Hose

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WARNING: Danger of scalding! Only perform this work after engine has cooled down.

Detach fuel line (1) from heater (5).

Release hose clamp (3).

Detach water hose (2) from heater (5).

M54, M62 Only:

Release screw (4).

All:

Detach exhaust hose (6) in direction of arrow from heater (5).

Lift heater (5) upwards.

Unfasten hose clip (2).

Detach water hose (1).

Lift out heater.

Fig 3: Locating Exhaust Hose

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Installation:

Replace gasket (3).

Make sure exhaust hose (4) is correctly seated on flange of heater (5).

Fill and vent cooling system. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (M54/M56) .

Fig 4: Identifying Water Hose And Clip

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