Dayco 89717 Accessory Drive Belt Tensioner Assembly

Overview of Dayco Accessory Drive Belt Tensioner Assembly 89717

The Dayco 89717 accessory drive belt tensioner assembly is designed for reliable serpentine belt tension management in select Toyota, Lexus, and Scion vehicles. Engineered for automatic operation with a counterclockwise direction, this tensioner supports optimal belt performance and longevity.

• Serpentine belt type compatible
• Automatic tensioner design for consistent belt tension
• Counterclockwise rotation direction
• Single pulley with 70mm diameter and 24mm width
• Flat pulley surface for improved belt contact

Technical Details and Specifications

This Dayco accessory drive belt tensioner assembly (part number 89717) features a single pulley with a 70mm diameter and 24mm width, designed with a flat surface to ensure proper serpentine belt alignment and reduce slippage. The automatic tensioner maintains consistent tension on the belt system, which is critical for the efficient operation of engine accessories. The counterclockwise rotation direction matches the original equipment specifications for compatible vehicles.

Compatible Vehicles and Applications

This tensioner assembly is compatible with various Toyota, Lexus, and Scion models, including the Toyota Camry, Highlander, RAV4, Sienna, Venza, the Lexus NX300h, and the Scion tC. It is specifically designed to meet the accessory drive belt system requirements of these vehicles, ensuring proper fit and function.

• Maintains proper serpentine belt tension to prevent slipping
• Reduces belt noise and wear
• Supports smooth operation of engine accessories such as alternator and power steering
• Prevents premature belt failure due to improper tension

Installation Notes and Tips

When installing the Dayco 89717 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. The counterclockwise rotation direction should be verified during installation to match the original equipment setup. Use appropriate tools to relieve tension safely and avoid damage to the tensioner or belt. Inspect the belt for wear and replace if necessary during installation.

Quality Assurance and Warranty

Dayco manufactures this accessory drive belt tensioner assembly to meet or exceed OEM standards for durability and performance. While specific warranty details are not provided here, Dayco products typically come with a limited warranty against defects in materials and workmanship. Refer to Dayco’s official documentation for complete warranty information.