Sprinter II 2014-2017 OM651 4Cyl ONLY
The decoupling pulley is furnished with the new alternator.
This unit is New and NOT remanufactured. It is the same unit sold at a Mercedes dealer.
To check the integrity of your alternator pulley, simply remove the belt and place a screwdriver into the front of the alternator cooling fan to stop the armature from rotating. Then turn the pulley by hand. If it moves one direction but, not the other, it is functional. If it will not rotate at all, it has failed.
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