This serpentine belt tensioner (OEM Part Number 079903133AM) plays a crucial role in maintaining proper tension on the serpentine belt system, which drives various engine components. Located on the front of select Audi and Volkswagen models, it helps prevent belt slippage, ensuring that all accessories receive adequate power. Commonly identified as a belt tensioner or roller, this part addresses potential issues like inconsistent accessory operation.
Compatibility includes the 2013-2016 Audi RS5 4.2L V8, as well as the 2011-2012 Audi A8 Quattro models with 4.2L and 6.3L engines. Interchangeable with part numbers 079903137AG, 079903389A, and others, it ensures secure fitment for optimal performance.
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