INA FT40122 Accessory Drive Belt Tensioner Assembly - Alternator

Reliable Accessory Drive Belt Tensioner for BMW and Rolls-Royce

The INA FT40122 accessory drive belt tensioner assembly is designed to maintain optimal belt tension in select BMW and Rolls-Royce models. Engineered for durability and precise fitment, this tensioner supports the proper function of your vehicle's accessory drive system.

• Compatible with BMW 545i, 550i, 645Ci, 650Ci, 650i, 745i, 745Li, 750i, 750Li, 760i, 760Li models
• Also fits Rolls-Royce Phantom and X5 models
• Part number FT40122 ensures exact replacement fit
• Maintains correct tension on accessory drive belts to prevent slippage
• Constructed for long-lasting performance under varying operating conditions

Product Details and Compatibility

The INA FT40122 accessory drive belt tensioner assembly is specifically designed for use in a range of BMW and Rolls-Royce vehicles, including popular models such as the BMW 545i, 650i, and 750Li, as well as the Rolls-Royce Phantom and X5. This component plays a critical role in the accessory drive belt system by applying consistent tension to the belt, which drives essential engine accessories like the alternator, power steering pump, and air conditioning compressor. Using the correct tensioner assembly helps maintain engine efficiency and prevents premature belt wear.

Common Applications and Problem Resolution

• Prevents accessory belt slippage and squealing noises
• Reduces risk of belt misalignment and uneven wear
• Helps avoid loss of power to engine accessories
• Addresses tensioner pulley wear or failure
• Eliminates vibration issues related to belt tension

Installation Notes and Tips

When installing the INA FT40122 tensioner assembly, ensure the engine is cool and the accessory drive belt is properly routed according to the vehicle’s service manual. Use appropriate tools to relieve tension from the old belt and carefully remove the existing tensioner. Verify the new tensioner matches the original part number FT40122 before installation. After mounting, double-check belt alignment and tension to avoid premature wear or noise.

Quality Assurance and Warranty

INA manufactures the FT40122 accessory drive belt tensioner assembly to meet strict OEM standards for fit, form, and function. This part undergoes rigorous quality control to ensure reliable performance in BMW and Rolls-Royce vehicles. While specific warranty details may vary, INA typically offers coverage against manufacturing defects to provide confidence in the product’s durability and longevity.