Parts for your 2017 Subaru Xv-Drive belt tensioner

2017 Subaru XV drive-belt tensioner: what it does and how to look after it

Yes, the 2017 Subaru XV is fitted with a drive-belt tensioner for its main accessory (serpentine) belt. Subaru’s factory service manual for the FB20 engine (Drive Belt section, “V-belt auto tensioner”) and the Subaru parts catalogue for the 2017 XV (GP/GPE) list an automatic tensioner assembly for the alternator/water pump belt. Technical catalogues from major belt suppliers also show a tensioner on the main belt, while noting the A/C runs a separate stretch-fit belt with no tensioner. So, the tensioner is absolutely relevant on this model—just not for the A/C belt.

The drive-belt tensioner keeps constant, correct tension on the XV’s accessory belt as it spins the alternator and water pump. Because belt length changes with heat and wear, the spring-loaded tensioner takes up slack automatically, preventing slip, squeal and poor charging. When it’s healthy, the belt runs straight and quiet