12 31 020 Removing and installing or replacing alternator (N62): Overview

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Switch off ignition
Disconnect battery negative lead and cover
Remove fan cowl with electric fan
Remove alternator drive belt

IMPORTANT: Risk of damage! Cover radiator.

Remove cover (1) and release screw underneath.

Remove deflecting element (2).

Fig 1: Removing Deflecting Element

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Unfasten screws.

Fig 2: Unfastening Alternator Screws

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Pull alternator (1) forwards until connections are accessible.

Unlock plug (1) and remove.

Remove cover (2) and release nut underneath.

Fig 3: Removing Cover And Releasing Nut Underneath

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Disconnect battery positive lead from alternator.