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PN: 6012000970M40 · SCHAEFFLER
Accessory drive belt tensioner pulley, designed to maintain proper tension in the belt drive system and ensure the operation of auxiliary components.
Every 80,000 - 100,000 km or when replacing the accessory belt.
Squealing noises from the engine, uneven belt wear, excessive vibrations in the pulley system.
Accessory belt breakage, loss of power steering, alternator failure, or engine overheating if the water pump stops.