GMB 415-9870 Engine Timing Belt Tensioner

Engine Timing Belt Tensioner for BMW

GMB 415-9870 is an engine timing belt tensioner built to meet or exceed OEM specifications. It is a direct-fit service part for select BMW 325i, 325is, 325iX, 525i, 528e, 325e, and 325es applications, with fitment covering model years from 1982 through 1993.

• Engine timing belt tensioner for valve train service
• Manufactured to meet or exceed OEM specifications
• Metal pulley construction for durability
• Pulley and belt type: Serpentine & V-Belt
• Single-groove pulley design
• GMB 415-9870 for select BMW timing belt applications

Fitment and Application Details

This timing belt tensioner is used in BMW engine timing systems where proper belt tension is critical for stable valve train operation. It fits 1987-1993 BMW 325i, 1987-1991 BMW 325is, 1988-1991 BMW 325iX, 1989-1990 BMW 525i, 1982-1988 BMW 528e, 1984-1987 BMW 325e, and 1986-1987 BMW 325es. For buyers searching for a BMW 325i timing belt tensioner or a BMW 528e engine timing belt tensioner, part number 415-9870 is the relevant reference.

This part cross-references Gates T41083 and URO 11311468743 for the same application.

What It Helps Address

• Timing belt slack that can affect engine timing stability
• Noise from a worn or rough tensioner pulley
• Uneven belt tracking caused by pulley wear
• Service replacement for aging BMW timing components
• Loss of proper belt tension in the engine drive system

Installation Notes and Tips

Verify engine code and belt routing before installation, since BMW timing components can vary by model year and engine configuration. Inspect the timing belt, idlers, and related wear parts at the same time, and confirm pulley alignment before returning the engine to service. Use the vehicle fitment list to match the exact year and model before ordering GMB 415-9870.

Quality Assurance

GMB states that this part is manufactured to meet or exceed OEM specifications, supporting consistent fit and function for the listed BMW applications. The metal pulley construction is selected for service durability in timing belt use.