Mubea 06M-903-133-J Accessory Drive Belt Tensioner Assembly

The Mubea 06M-903-133-J is an OEM-quality accessory drive belt tensioner assembly engineered for Volkswagen and Audi 3.0-liter engines. This assembled unit applies consistent, calibrated load to the alternator serpentine belt, ensuring proper belt tension throughout the engine's operating range.

Mubea is a globally recognized original equipment manufacturer (OEM) supplier to the Volkswagen Audi Group (VAG), meaning this tensioner meets the same design and material specifications as the factory-installed component. A properly functioning belt tensioner is critical for preventing belt slip, reducing accessory wear, and eliminating the squeaking or squealing noises associated with a loose or under-tensioned drive belt.

Key Features:

• OEM-quality construction from a factory-authorized VAG supplier
• Designed for use with the alternator/serpentine belt on 3.0-liter engines
• Maintains correct belt tension to protect alternator, power steering pump, and A/C compressor
• Direct OEM replacement — no modifications required for installation
• Replaces worn or failed tensioner assemblies to restore proper drive belt operation

OEM / Cross-Reference Part Numbers: 06M-903-133-J, 06M903133J, 6M903133J

This tensioner is a direct OEM replacement suitable for vehicles equipped with the applicable 3.0-liter engine platform. Always verify fitment using your vehicle's VIN before ordering.