Shop OEM BMW Part # 11287509508 (11-28-7-509-508). Accessory Drive Belt Idler Pulley. 2.5, 3.0 LITER, 2003-05. Drive Belt Idler Pulley - Repair or Replace If you've noticed that the

Accessory Drive Belt Idler Pulley. Deflection Pulley.
Accessory Drive Belt Idler Pulley. Grooved.

Accessory Drive Belt Idler Pulley

Fits Z4

2.5, 3.0 LITER, 2003-05.
Drive Belt Idler Pulley - Repair or Replace
If you've noticed that the drive belt on your is becoming worn or is making a squealing noise, your drive belt idler pulley may be worn out. Replacing your drive belt idler pulley may be the solution.