M52TU and M54:

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW X5, 2006 BMW X3, 2005 BMW X5, 2005 BMW X3, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Unfasten following plug connections:

Resonance flap
Idle speed control valve

Fig 1: Unfastening Plug Connections
Courtesy of BMW OF NORTH AMERICA, INC.

Installation location:

Idle actuator (2) is fitted below intake air manifold, directly above throttle (1).

Fig 2: Identifying Idle Actuator Location

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on cable duct mounting.

Fig 3: Releasing Screws

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Release screws (2) on holder of idle actuator (3).

Remove idle actuator with holder from intake air manifold.

Detach idle actuator (2) from rubber retainer (4).

Fig 4: Detaching Idle Actuator

Courtesy of BMW OF NORTH AMERICA, INC.

Always replace gasket (1) from idle actuator (2) to intake air manifold. However, during reinstallation, do not fit gasket on idle actuator but install first in intake air manifold.

Installation:

Replace seal (1).

Fig 5: Removing & Installing Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Coat gasket (1) on inside with antiseize agent.

NOTE: Interrogate fault memory of DME control unit.

Check stored fault messages.

Rectify faults.

Then clear fault memory.