This is a genuine, brand-new Volvo Penta serpentine belt tensioner, part number 3860079. It's not an aftermarket copy—it's the original equipment manufacturer (OEM) part, which means it's made to the exact same specifications as the one that came on your engine. A properly functioning tensioner is crucial for keeping the correct tension on the serpentine belt, which drives accessories like the alternator, water pump, and power steering pump. If your tensioner is wobbling, making noise, or not maintaining tension (causing belt squeal or slip), it's time for a replacement. This part is sold individually. As always with marine and industrial engine parts, it's very important to verify the fitment for your specific Volvo Penta engine model and serial number before purchasing. Using the correct OEM part helps ensure reliability and longevity for your engine's belt drive system. A straightforward swap for a common maintenance item.
