Some cars came with mechanical water pump/alternator belt tensioner assemblies while others came with a hydraulic type. Note that the mechanical style is only available as an assembly - the bearing or pulley is not available separately. Therefore, it is important to identify which style is on your vehicle BEFORE placing your order.
Drive Belt Idle Roller (on Engine Console, Upper)
Cayman with Auto Transmission (2007-08) Cayman S with Auto Transmission (2006-08)