Drive Belt Tensioner Pulley Idler Pulley for E46 E36 E39 X5 E53 Z4 E85 E86 325i 330i 328i 328i M3 525i 530i It is important to inspect and replace the pulleys regularly. The pulley contains a set of bearings that produce a screeching or rumbling sound when worn. Directly replaces part numbers 11287841228, 11281748131, 11281726343, 11281726181, 11281730571, 11281738061, 11281738605, 11281748130. Fitment: 3 Series E36 320i 323i 325i 328i M3 3.0 M3 3.2 1993–1998 3 Series E46 320i 323i 325i 325xi 328i 330i 330xi 1998–2005 5 Series E39 520i 523i 525i 528i 530i 1998–2003 X5 E53 3.0i 2000–2006 Z4 E85 E86 2.2i 2.5i 3.0i 2002–2008 Includes: 1 x Tensioner Pulley 1 x Idler Pulley This replacement is made by an independent supplier. All brand references are used solely to indicate compatibility.