Gates 39457 Accessory Drive Belt Tensioner Assembly

Reliable Automatic Belt Tensioner for Lexus Vehicles

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39457) is engineered to maintain optimal tension on the accessory drive belt system. Designed specifically for select Lexus models, this steel tensioner assembly ensures consistent belt performance and longevity.

• Constructed from durable steel for strength and longevity
• Compatible with V-ribbed accessory drive belts
• Single pulley design with a smooth backside contact surface
• Two mounting holes for secure installation
• Precision dimensions: 2.56 inch (65 mm) outside diameter, 1.1 inch (28 mm) width, and 0.67 inch (17 mm) bearing bore inside diameter
• OE exact fit for reliable replacement

About the DriveAlign Premium OE Automatic Belt Tensioner Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates focuses on delivering original equipment quality and fitment. This product line is designed to meet or exceed factory specifications, providing a direct replacement tensioner assembly that supports proper belt tension and reduces wear on accessory components. The 39457 tensioner is part of this line, ensuring compatibility and performance for Lexus accessory drive belt systems.

Product Details and Specifications

This accessory drive belt tensioner assembly features a steel construction that offers durability under engine operating conditions. It includes a single pulley without flanges, designed for use with V-ribbed belts commonly found on Lexus GS200t, GS300, IS200t, IS300, NX200t, NX300, RC200t, and RC300 models. The pulley measures 2.56 inches (65 mm) in outside diameter and 1.1 inches (28 mm) in width, with a bearing bore inside diameter of 0.67 inches (17 mm). The smooth backside contact surface helps reduce belt wear and noise, while the two mounting holes provide a secure fit during installation.

Compatible Lexus Models and Applications

• Lexus GS200t
• Lexus GS300
• Lexus IS200t
• Lexus IS300
• Lexus NX200t
• Lexus NX300
• Lexus RC200t
• Lexus RC300

Common Issues Addressed by This Belt Tensioner

• Eliminates belt slippage caused by worn or weak tensioners
• Prevents premature accessory belt wear and damage
• Reduces noise from loose or misaligned belts
• Maintains proper belt tension for efficient accessory operation
• Helps avoid engine overheating due to accessory drive failure

Installation Notes and Tips

Ensure the engine is cool before beginning installation. Verify the correct orientation of the tensioner assembly and align the mounting holes precisely. Use appropriate torque specifications for mounting bolts to avoid damage. Inspect the accessory drive belt for wear and replace if necessary during installation. Proper installation will help maintain belt tension and extend the life of the belt and related components.

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39457) is manufactured to meet original equipment standards. It undergoes rigorous quality control to ensure durability and fitment accuracy. This part is rated as an OE exact replacement, providing confidence in performance and reliability. Warranty details are provided by Gates and typically cover defects in materials and workmanship.