Alternator For Bmw 320 Series 2.2L 2001-2005, 323 Series 2.5L 2006, 325 Series 2.5L 2001-2006, 325 Series 3.0L 2006, 330 Series 3.0L 2001-2006, 525 Series 2.5L 2001-2003, 530 Series 3.0L 2001-2003, X5 3.0L 2001-2006, Z3 2.5L 2001-2002, Z3 3.0L 2001-2002. 12 Volt, 120 Amp With 6-Groove Serpentine Pulley And Internal Regulator . Replaces Bmw 12-31-7-501-595, 12-31-7-501-597, 12-31-7-501-599, 12-31-7-501-690, 12-31-7-501-755; Bosch 0-124-515-050.