Gates 39114 Accessory Drive Belt Tensioner Assembly

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39114) is engineered for precise belt tension control in BMW vehicles. Designed specifically for select BMW 1 Series M, 135i, 335i, 335is, 335i xDrive, 335xi, 535i, 535i GT, 535i xDrive, and 535xi models, this tensioner assembly ensures reliable accessory drive belt performance.

• Constructed from durable thermoplastic and steel materials
• Includes two smooth backside pulleys without flanges
• Compatible with V-ribbed belt systems
• Features a single mounting hole for secure installation
• OE exact fit and performance for BMW applications
• Comes complete with tensioner assembly and mounting bolt

Detailed Product Features and Specifications

This accessory drive belt tensioner assembly features two pulleys, each with a 70 mm (2.76 in) outside diameter and a width of 30 mm (1.18 in). Both pulleys have a bearing bore inside diameter of 17 mm (0.67 in), designed to accommodate V-ribbed belts commonly used in BMW engines. The pulleys are smooth on the contact surface and do not have flanges, which supports consistent belt tracking and tension. The single mounting hole simplifies installation while maintaining secure attachment to the engine assembly.

About the DriveAlign Premium OE Automatic Belt Tensioner Line

The DriveAlign Premium OE Automatic Belt Tensioner product line by Gates focuses on delivering original equipment (OE) exact replacements for accessory drive belt tensioners. This line is engineered to meet or exceed OEM specifications, ensuring proper belt tension and alignment for optimal engine accessory performance. The 39114 tensioner assembly is part of this line, providing a reliable solution for maintaining belt system integrity in BMW vehicles.

Common Applications and Problem Resolution

• Restores proper tension to worn or failing accessory drive belts
• Eliminates belt slippage and associated noise
• Prevents premature belt wear and damage to pulleys
• Addresses issues related to belt misalignment or tensioner failure
• Improves overall accessory drive system reliability in BMW 1 Series M, 135i, 335i, and 535i models

Installation Notes and Tips

• Ensure compatibility with your specific BMW model before installation
• Use the included mounting bolt to secure the tensioner assembly
• Inspect the V-ribbed belt for wear and replace if necessary during installation
• Follow manufacturer torque specifications for mounting hardware
• Verify proper belt alignment and tension after installation

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39114) is manufactured to meet OE standards for fit, form, and function. Constructed from thermoplastic and steel, this tensioner assembly is designed for durability and consistent performance. While specific warranty details may vary, Gates products typically come with a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.