Hayden 5027 Accessory Drive Belt Idler Pulley

Hayden 5027 Idler Pulley for Mercedes-Benz

The Hayden 5027 accessory drive belt idler pulley is a direct-fit style replacement for serpentine belt systems on select Mercedes-Benz models. Built with a black plastic pulley body and 6-groove design, it supports smooth belt routing in accessory drive applications where proper pulley alignment matters.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• 6-groove pulley design for 0.875 in. belt width applications
• Black plastic construction
• Outside diameter: 2.500 in. (63.500 mm)
• Inside diameter: 1.06 in. with 0.562 in. bore diameter
• 1 mounting hole; mounting hardware not included
• Meets or exceeds OEM requirements
• Cross-reference: Dayco 89086

Product Details

This Hayden pulley, part number 5027, is an idler/tensioner pulley used in accessory drive belt systems to maintain belt path and support consistent operation of the serpentine belt. The pulley measures 1.062 in. wide and is designed for 6-groove belt routing, making it a practical OE-style replacement for Mercedes-Benz C280, C36 AMG, E320, E420, 300CE, 300E, 300SL, 300TE, 300SEL, S320, S420, S430, S500, SL500, and SL600 applications listed below. Hayden 5027 also cross-references Dayco 89086 for the same application.

Vehicle Fitment

• Fits 2000-2001 Mercedes-Benz SL600, pulley
• Fits 1994-1999 Mercedes-Benz S320, pulley
• Fits 1996-1999 Mercedes-Benz S420, pulley
• Fits 1999 Mercedes-Benz S430, pulley
• Fits 1996-1999 Mercedes-Benz S500, pulley
• Fits 1998 Mercedes-Benz SL500, pulley
• Fits 1994-1997 Mercedes-Benz C280, w/ 6 Groove Pulley; pulley
• Fits 1995-1997 Mercedes-Benz C36 AMG, w/ 6 Groove Pulley; pulley
• Fits 1994-1997 Mercedes-Benz E320, w/ 6 Groove Pulley; pulley
• Fits 1997 Mercedes-Benz E420, w/ 6 Groove Pulley; pulley
• Fits 1993 Mercedes-Benz 300CE, pulley
• Fits 1993 Mercedes-Benz 300E, pulley
• Fits 1990-1993 Mercedes-Benz 300SL, pulley
• Fits 1988-1992 Mercedes-Benz 300TE, pulley
• Fits 1990-1991 Mercedes-Benz 300SEL, pulley

Common Uses

• Replacing a worn or noisy serpentine belt idler pulley
• Restoring proper belt tracking in the accessory drive system
• Addressing belt squeal caused by pulley wear or surface damage
• Correcting belt misalignment related to pulley deterioration
• Supporting stable operation on Mercedes-Benz C280, E320, and S-Class belt drive systems

Installation Notes and Quality

Verify pulley diameter, groove count, and belt width before installation to confirm the correct match for your vehicle. Inspect the belt, tensioner, and adjacent accessory drive components during service so the new pulley is installed into a clean, properly aligned system. Hayden 5027 is listed as meeting or exceeding OEM requirements for this application.