Litens 920484A Overrunning Alternator Decoupler OAD Pulley

The Litens 920484A is an Overrunning Alternator Decoupler (OAD) pulley designed as a direct replacement for Mercedes-Benz applications. This advanced pulley features Litens' patented internal spring and clutch system that absorbs engine vibrations and allows the alternator to free-wheel during belt deceleration, protecting the entire front-end accessory drive (FEAD) system.

Key Features:

• Original equipment quality design meeting or exceeding OE specifications
• Internal torsion spring and damping device for smooth engagement and vibration absorption
• Free-wheel capability in one direction to eliminate damaging belt tension peaks
• Reduces noise, vibration, and harshness (NVH) in the drive system
• Extends belt life and enhances accessory drive component durability
• Engine-specific design for optimal performance and reliability
• Replaces OEM part numbers 2701550115 and 2701550315

The OAD pulley is designed as a sacrificial component that protects both the alternator and other belt-driven accessories from harmful torsional vibrations. Under normal driving conditions, decoupler pulleys should be replaced approximately every 100,000-120,000 miles to maintain optimal system performance. Litens is the world's largest supplier of original equipment power transmission products and holds over 2,000 patents in belt drive technology.

Application Note: This pulley fits Mercedes-Benz CLA250, GLA250, CLA45 AMG, and GLA45 AMG models. Decoupling pulleys are engine-specific and should never be interchanged with standard solid pulleys.