Special tools required:

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

115 030
115 040

If necessary, remove air duct.

NOTE: S54

Remove engine underguard and release fan cowl.

IMPORTANT: Left-hand threads.

Using special tool 11 5 030, grip pulley and unfasten cap nut from water pump using special tool 115 040.

If necessary, unfasten fan cowl.

Take the fan wheel with fan coupling off the water pump and remove.

Fig 1: Griping Pulley & Unfastening Cap Nut From Water Pump Using Special Tool 115 040

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Tighten down fan impeller using special tool 11 5 040.

Tightening torque. Refer to ENGINE - TIGHTENING TORQUES .

NOTE: When using special tool 11 5 040, 30 Nm on the torque wrench scale are equivalent to a tightening torque of 40 Nm.

Fig 2: Identifying Special Tool 11 5 040

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screws and detach fan from fan coupling.

Fig 3: Unfastening Screws & Detaching Fan From Fan Coupling

Courtesy of BMW OF NORTH AMERICA, INC.