Hayden 5042 Accessory Drive Belt Idler Pulley

Hayden 5042 Accessory Drive Belt Idler Pulley

Hayden 5042 is an accessory drive belt idler pulley for serpentine belt systems. It uses a black plastic pulley body with a 6-groove profile and a 2.500-inch outside diameter to match the belt routing used on select Saab applications.

Compatible with 1994-1998 Saab 900, 1999-2000 Saab 9-3, and 1999-2000 Saab 9-5, this Hayden pulley is built to meet or exceed OEM requirements for the listed applications. The Hayden pulley line focuses on direct-fit belt drive components for accessory drive service, and part number 5042 follows that approach for common import fitments.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Black plastic construction
• 6-groove pulley design
• 2.500-inch outside diameter
• 1.062-inch pulley width
• Single mounting hole design
• Mounting hardware included
• Meets or exceeds OEM specifications for the listed applications

Detailed Description

Hayden 5042 is an idler / tensioner pulley used in the accessory drive belt system to maintain proper belt routing and contact across the serpentine belt path. With a 0.668-inch bore diameter, 0.90-inch inside diameter, and 26.9 mm width, it is sized for the specified Saab belt drive applications. The 6-groove layout supports a 0.875-inch serpentine belt width, helping maintain consistent belt tracking in the accessory drive system.

This part cross-references Dayco 89083 and Gates 38083 for the same application. If you are replacing a worn pulley on a Saab 900, Saab 9-3, or Saab 9-5, Hayden 5042 provides a direct-fit replacement option for the listed model years.

What It Helps Fix

• Squealing or chirping from a worn idler pulley
• Belt misalignment in the serpentine drive system
• Rough pulley rotation or bearing-related noise
• Visible pulley wear, cracking, or surface damage
• Accessory drive belt tracking issues on Saab 900, Saab 9-3, and Saab 9-5 applications

Installation Notes and Tips

Verify pulley diameter, groove count, and bore dimensions against the original part before installation. Inspect the serpentine belt, tensioner, and adjacent accessory drive components for wear while servicing the pulley. Confirm correct belt routing after installation and check for smooth pulley rotation before returning the vehicle to service.

Quality Assurance

Hayden 5042 is listed as meeting or exceeding OEM requirements for the specified applications. It is engineered as a direct replacement pulley for the confirmed Saab fitments and is backed by Hayden’s accessory drive component manufacturing standards.