Gates 39381 Accessory Drive Belt Tensioner Assembly

OE Automatic Belt Tensioner for BMW and MINI

Restore proper accessory drive belt tension with the Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 39381. This OE Exact tensioner is built to match original fit, form, and function for a wide range of BMW and MINI applications, including BMW M3, 330i, 430i, X3, X5, and MINI Cooper models.

Gates applies its OE system design experience to this DriveAlign Premium OE Automatic Belt Tensioner line, using rigid manufacturing tolerances to support consistent belt control and dependable alignment in the accessory drive belt system.

Key Features

• OE Exact replacement for factory-style fitment and operation
• Thermoplastic construction for the tensioner body
• Single smooth/backside pulley for V-ribbed belt systems
• 3 mounting holes for direct installation on listed applications
• 1.02 in. width and 2.17 in. outside diameter pulley dimensions
• Bearing bore inside diameter: 0.67 in. / 17 mm
• Designed for BMW and MINI accessory drive belt system service

Product Details

The Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 39381, is an accessory drive belt tensioner assembly engineered for OE-style performance on select BMW and MINI vehicles. It uses a smooth/backside pulley with a V-ribbed belt profile and is manufactured to tight specifications to help maintain proper belt tension and pulley tracking. If you are replacing a worn BMW belt tensioner or servicing a MINI accessory drive belt system, this part provides a direct-fit solution for the listed applications.

This part cross-references Four Seasons 39381 for the same application.

What It Helps Address

• Belt squeal caused by weak or inconsistent tension
• Accessory belt flutter or vibration
• Uneven belt tracking on the drive system
• Noise from a worn tensioner pulley or bearing
• Loss of proper belt tension on BMW and MINI engines

Installation Notes and Tips

• Verify the vehicle application by year, make, and model before ordering.
• Inspect the accessory drive belt, idler pulleys, and related components during service.
• Confirm pulley alignment and mounting points match the original tensioner.
• Use the part number 39381 when cross-checking replacement requirements.

Quality Assurance

Gates manufactures DriveAlign Premium OE Automatic Belt Tensioners to rigid tolerances and specifications so the part matches OE fit, form, and function on the listed BMW and MINI applications. Part number 39381 is built as an OE Exact replacement for dependable service in the accessory drive belt system.

Compatible Vehicles

• Fits 2021-2025 BMW M3, N/A
• Fits 2021-2024 BMW 228i Gran Coupe, N/A
• Fits 2020-2024 BMW 228i xDrive Gran Coupe, N/A
• Fits 2017-2024 BMW 230i, N/A
• Fits 2023-2024 BMW 230i xDrive, N/A
• Fits 2017-2021 BMW 230i xDrive, N/A
• Fits 2022-2024 BMW 330i, N/A
• Fits 2017-2020 BMW 330i, N/A
• Fits 2022-2024 BMW 330i xDrive, N/A
• Fits 2017-2020 BMW 330i xDrive, N/A
• Fits 2017-2024 BMW 430i, N/A
• Fits 2022-2024 BMW 430i Gran Coupe, N/A
• Fits 2017-2020 BMW 430i Gran Coupe, N/A
• Fits 2017-2024 BMW 430i xDrive, N/A
• Fits 2023-2024 BMW 430i xDrive Gran Coupe, N/A
• Fits 2017-2020 BMW 430i xDrive Gran Coupe, N/A
• Fits 2020-2024 BMW 840i, N/A
• Fits 2020-2024 BMW 840i Gran Coupe, N/A
• Fits 2020-2024 BMW 840i xDrive, N/A
• Fits 2020-2024 BMW 840i xDrive Gran Coupe, N/A
• Fits 2023-2024 BMW M2, N/A
• Fits 2021-2024 BMW M4, N/A
• Fits 2024 BMW X2, N/A
• Fits 2020-2022 BMW X2, N/A
• Fits 2018-2024 BMW X3, N/A
• Fits 2019-2024 BMW X4, N/A
• Fits 2017-2023 BMW 530i, N/A
• Fits 2017-2023 BMW 530i xDrive, N/A
• Fits 2020-2023 BMW M235i xDrive Gran Coupe, N/A
• Fits 2023 BMW M240i, N/A
• Fits 2017-2021 BMW M240i, N/A
• Fits 2017-2023 BMW M240i xDrive, N/A
• Fits 2021-2023 BMW X6, N/A
• Fits 2019-2023 BMW Z4, N/A
• Fits 2020-2023 MINI Cooper, N/A
• Fits 2020-2023 MINI Cooper Clubman, N/A
• Fits 2020-2023 MINI Cooper Countryman, N/A
• Fits 2020-2022 BMW X1, N/A
• Fits 2016-2021 BMW 740i, N/A
• Fits 2017-2021 BMW 740i xDrive, N/A
• Fits 2019-2021 BMW X5, N/A
• Fits 2017-2020 BMW 440i, N/A
• Fits 2017-2020 BMW 440i Gran Coupe, N/A
• Fits 2017-2020 BMW 440i xDrive, N/A
• Fits 2017-2020 BMW 440i xDrive Gran Coupe, N/A
• Fits 2017-2020 BMW 540i, N/A
• Fits 2017-2020 BMW 540i xDrive, N/A
• Fits 2020 BMW M340i, N/A
• Fits 2020 BMW M340i xDrive, N/A
• Fits 2019-2020 BMW X7, N/A
• Fits 2017-2019 BMW 330i GT xDrive, N/A
• Fits 2019 BMW 640i Gran Coupe, N/A
• Fits 2019 BMW 640i xDrive Gran Coupe, N/A
• Fits 2019 BMW 640i xDrive Gran Turismo, N/A
• Fits 2016-2018 BMW 340i, N/A
• Fits 2017-2018 BMW 340i GT xDrive, N/A
• Fits 2016-2018 BMW 340i xDrive, N/A