Parts for your 2012 Subaru Legacy-Drive belt tensioner

2012 Subaru Legacy drive-belt tensioner — what it does and when to replace it

Based on Subaru factory service information for the 2012 Legacy/Outback platform (engine section: V-belt/auto-tensioner procedures) and Subaru’s genuine parts catalogue listings for a “V-belt tensioner assembly” on both FB25 (2.5i) and EZ36 (3.6R) engines, this model absolutely uses an automatic accessory drive-belt tensioner. Independent catalogues from established belt system suppliers used in Australia and New Zealand also list a dedicated tensioner for the 2012 Legacy range, confirming fitment across the board. So yes — the drive-belt tensioner is relevant and fitted to the 2012 Subaru Legacy.

On this Legacy, the drive-belt tensioner’s job is to keep the serpentine belt snug and steady as it spins the alternator, air-con compressor and other accessories. It’s a spring-loaded unit that automatically adjusts as the belt wears, holding the right tension to stop slip, squeal and poor charging. When it’s healthy, the belt runs true and quiet under the bonnet