64 12 500 Removing and installing or replacing complete heater

WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

M57 only:

Remove air guide from fuel cooler.

Loosen screws (1).

Detach fuel cooler (3) in direction of arrow from guide (2) and place to one side.

Fig 1: Identifying Fuel Cooler, Screws, And Guide

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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 2: 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 3: Identifying Heater, Intake Hose, Hose Clip, And screws

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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).

M57 only:

Release screw (4) and remove retaining fixture with centering for fuel cooler.

Installation

Make sure retaining fixture with centering for fuel cooler is correctly seated.

Fig 4: Identifying Heater, Fuel Line, Water Hose, Hose Clamp, Exhaust Hose, And Screw

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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.

Installation

Replace gasket (3).

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

Fill and vent cooling system. See VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (M54/M56) .

Fig 5: Identifying Water Hose, Hose Clip, Gasket, Exhaust Hose, And Heater

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