12 31 020 Removing and installing or replacing alternator

Necessary preliminary tasks:

N14 only:

Release bolt.

Remove bracket (1) and place to one side.

Fig 1: Identifying Bracket And Bolt

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Bring belt tensioner (1) with wrench (2) into assembly position and hold.

Secure assembly position of belt tensioner (1) by sliding locating pin (3) in direction of arrow.

WARNING: Danger of injury!
Remove wrench (2) again from belt tensioner (1).

Remove drive belt (4) from alternator.

Fig 2: Removing Drive Belt (4) From Alternator

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Unlock connector and remove.

Release nut (1) and remove battery positive lead.

Tightening torque 13.5 Nm

Release screws (2) and remove belt tensioner (3).

Tightening torque 20 Nm

Fig 3: Identifying Belt Tensioner (3), Nut (1) And Screws (2)

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Release screw with joint extension (1).

Tightening torque 20 Nm

IMPORTANT: Do not bend refrigerant line.
Bending the line can cause leaks!

Remove alternator.

Fig 4: Identifying Screw (1)

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