ALT TENSIONER Serpentine Belt Tensioner Assembly (Gates 39084) - Direct Fit, 2-Year Warranty

Swap out that worn-out tensioner with this rock-solid ALT TENSIONER automatic belt tensioner assembly.

It’s a direct replacement for Gates 39084 and other OE part numbers like 3914086.

Built with a durable plastic pulley and designed to keep your serpentine belt running smooth without slipping or squeaking.

Whether you’re wrenching for performance or just doing routine maintenance, this part delivers.

Comes with a full 2-year warranty—so you can install it and forget it.

Universal?

Nope—this is a specific fit for compatible vehicles, so double-check your ride.