Only for models with optional second A/C compressor - This unit has grooved surfaces for both a serpentine belt and a V-belt.
Replace crankshaft bolt at same time as pulley. There are two different versions of this bolt and woodruff keys for this unit. See both versions of the bolts and woodruff keys shown below.
Detailed Description
Sprinter 2002-2006
This is ONLY for those vehicles with accessory rear (roof-mounted) A/C having a 2nd A/C compressor, which is driven by a second belt, a V-belt.