OE Quality Serpentine Idler Pulley – Fits Dodge, Freightliner, Mercedes, Saturn – ALT04088

If you’ve got a squeaky belt or a wobbly pulley, swapping this idler pulley might just shut it up.

This is an ALT TENSIONER brand pulley, part ALT04088, and it’s a direct replacement for a ton of vehicles—think Dodge, Freightliner, Mercedes, and Saturn from the early 2000s up to about 2018.

It cross-references with numbers like 36212, 5117690AA, and 6112340193.

It’s made of durable plastic with the right bearings inside, and it’s designed for serpentine belts.

Comes with a 2-year or 50,000-mile warranty.

Just unbolt the old one and bolt this bad boy on.