11 28 010 Replacing drive belt for alternator (N54, N54T)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Mark the direction of rotation of the drive belt if it is to be reused.

Depending on the build date (version), the idler pulleys can be fitted with and without grooves.

Necessary preliminary tasks:

Remove FAN COWL

Unfasten hose clip (1).

Release quick-connect fastener (3) 90° on boost pressure hose in direction of arrow.

Pull off air hose (2).

Installation note:

Bring lock (3) back 90° into installation position.

Recirculated air hose must audibly snap into place.

Fig 1: Removing Quick-Connect Fastener

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Unclip line (1) from holder (2) in direction of arrow.

Fig 2: Unclipping Line From Holder

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Release coolant hose (1) from bracket (2).

Fig 3: Identifying Coolant Hose And Holder

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Release screw (1).

Fold air duct (2) down.

NOTE: Do not remove air duct (2).

Fig 4: Folding Air Duct Down

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Turn belt tensioner (1) in direction of arrow until bore is flush on housing.

Secure belt tensioner in place with special tool 11 3 340 .

Fig 5: Turning Belt Tensioner

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Remove drive belt (1).

Installation note:

Mark the direction of rotation of the drive belt if it is to be reused.

Pretension tensioning pulley (1) in direction of arrow.

Remove special tool 11 3 340 .

Fig 6: Identifying Drive Belt

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Installation note:

Note arrangement of drive belt

Arrow shows the direction of rotation.

Fig 7: Identifying Drive Belt Rotation Direction

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Assemble engine.

Installation note:

Risk of damage!

Check that drive belt is in correct installation position.