Dayco 89596 Accessory Drive Belt Idler Pulley - Left, Left Lower or Lower

Accessory Drive Belt Idler Pulley for Mercedes-Benz

The Dayco 89596 accessory drive belt idler pulley is built for serpentine belt routing in select Mercedes-Benz applications. It uses a polymer pulley body with a single bearing to support smooth belt tracking in the accessory drive system.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Polymer pulley construction
• Single bearing design
• Bearing inner diameter: 17 mm
• Bearing width: 14 mm
• Flat pulley profile
• Maximum belt width: 6-rib
• Dayco part number 89596

Detailed Description

Dayco 89596 is an accessory drive belt idler pulley designed for serpentine belt applications where stable belt guidance is required. The polymer construction and 17 mm by 14 mm bearing dimensions support consistent rotation in the accessory drive belt system. This pulley is listed for select Mercedes-Benz Sprinter 2500, Sprinter 3500, E250, GLK250, and ML250 applications, including Fits 2014-2017 Mercedes-Benz Sprinter 2500, Left Lower; Fits 2014-2017 Mercedes-Benz Sprinter 3500, Left Lower; Fits 2014-2016 Mercedes-Benz E250, Left; Fits 2013-2015 Mercedes-Benz GLK250, N/A; and Fits 2015 Mercedes-Benz ML250, Lower. If you are sourcing a Dayco 89596 replacement for a Mercedes-Benz accessory drive belt system, verify pulley position and belt width before installation.

What This Part Helps Address

• Belt noise from a worn idler pulley bearing
• Serpentine belt tracking issues
• Accessory drive belt vibration
• Uneven pulley rotation in the belt path
• Wear related to a damaged or rough idler surface

Installation Notes and Tips

Confirm the pulley position, belt type, and 6-rib maximum belt width before ordering. Match the bearing dimensions and flat pulley profile to the original component, and inspect the serpentine belt and adjacent pulleys for wear during service. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Dayco is a recognized supplier in the belt drive category, and this pulley is specified with defined material, bearing, and belt-width details to support accurate replacement selection. Use the vehicle fitment and part number 89596 to confirm application match before installation.