Key Features:
12 Volt system with impressive 180 Amp output
Brand new unit (not rebuilt or refurbished)
6-groove clutch pulley with 49 mm rib OD
Clockwise rotation design
Internal fan for efficient cooling
Internal regulator for consistent performance
Pad mount style for secure installation

Compatible With BMW:
128i L6 3.0L 2996cc 2008-2013
323i L6 2.5L 2497cc 2007-2011
328i L6 3.0L 2996cc 2007-2013
328i xDrive L6 3.0L 2996cc 2009-2013
328xi L6 3.0L 2996cc 2007-2008
330i L6 3.0L 2996cc N52 2006
330xi L6 3.0L 2996cc N52 2006
528i L6 3.0L 2996cc 2008-2010
528i xDrive L6 3.0L 2996cc 2009-2010
528xi L6 3.0L 2996cc 2008
X3 L6 3.0L 2996cc 2007-2010
X5 L6 3.0L 2996cc 2007-2008
X5 L6 3.0L 2996cc GAS 2009-2010

Replaces OEM Part Numbers: 12-31-7-550-968, 12-31-7-551-256, 12-31-7-555-926, 0-121-715-012, 0-121-715-112