Gates 90K-39081 Serpentine Belt Drive Component Kit

Accessory Belt Drive Kit for Sprinter Service

The Gates FleetRunner Heavy Duty Serpentine Kit 90K-39081 is built for accessory belt drive service on select Mercedes-Benz Sprinter vans. It brings the serpentine system components together in one package to simplify maintenance on fleet vehicles that need dependable belt drive performance.

Compatible with Mercedes-Benz Sprinter 2500, Sprinter 3500, and Sprinter 3500XD applications, this kit is a direct service solution for vehicles without rear A/C. The Gates 90K-39081 kit is organized around the belt drive system parts most often replaced together, helping reduce repeat service work.

Key Features

• Gates Accessory Belt Drive Kit for serpentine system service
• Includes belt drive components selected for the application
• Contents: 2 belts, tensioner, and idler
• Belt 1 part number: K070801HD
• Belt 2 part number: K060265SF
• Tensioner assembly part number: 39081
• Idler pulley part number: 36375
• Outside circumference specs: 80.75 in. (2051 mm) and 27 in. (686 mm)
• Belt top widths: .807 in. (20 mm) and .947 in. (24 mm)

Product Details

Gates FleetRunner Heavy Duty Serpentine Kits are organized to make proper serpentine system service more straightforward. This kit combines the belts, tensioner, and idler needed for the accessory drive system, and Gates notes that some FleetRunner kits incorporate design updates based on heavy-duty maintenance experience. For fleet maintenance and repair work, that means fewer separate part searches and a more complete service approach. This Gates 90K-39081 kit is a practical choice for Mercedes-Benz Sprinter 2500 and Mercedes-Benz Sprinter 3500 service, especially when replacing worn belt drive components at the same time.

Common Problems This Kit Can Address

• Squealing or chirping from worn serpentine belt components
• Belt tracking issues caused by aging tensioner or idler parts
• Loss of accessory drive performance from stretched or worn belts
• Repeat service visits when belt drive parts are replaced one at a time
• Maintenance downtime on Mercedes-Benz Sprinter 2500, Sprinter 3500, and Sprinter 3500XD vans

Installation Notes and Tips

Verify engine and accessory drive configuration before ordering. This kit is listed for 2010-2017 and 2019 Mercedes-Benz Sprinter 2500, 2010-2017 and 2019 Mercedes-Benz Sprinter 3500, and 2019 Mercedes-Benz Sprinter 3500XD applications without rear A/C. Confirm belt routing, pulley alignment, and tensioner condition during installation, and inspect the accessory drive system for wear before returning the vehicle to service.

Quality Assurance

Gates is a recognized name in belt drive components, and the FleetRunner line is focused on heavy-duty serpentine system service for fleet maintenance needs. This part cross-references Gates 90K-39081 for the same application.