11 28 020 Replacing alternator drive belt tensioner (M52 / S52 / M52TU / M54)

WARNING: This page is about a different car, the 2005 BMW Z4, 2004 BMW Z4, and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove alternator drive belt . See 11 28 010 Replacing Alternator Drive Belt (M52 / S52 / M52TU / M54 / M56) .

NOTE: Version with auxiliary tensioning roller:
Remove auxiliary tensioning roller.

Installation:

Locking device of auxiliary tensioning roller must snap into groove on alternator.

Fig 1: Removing Auxiliary Tensioning Roller

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws for drive belt tensioner.

Fig 2: Releasing Screws For Drive Belt Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.