Omix proudly offers all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement accessory drive belt tensioner w idler pulley fits 99 - 04 Grand Cherokee WJ, 05 - 09 Grand Cherokee WK, 02 - 07 Liberty KJ, and 06 - 09 Commander XK models equipped with 3.7 and 4.7 - liter engines. Features a tensioner pulley with a 76 mm OD and 28.7 mm width while the idler pulley is 90 mm OD and a 27 mm width. Replaces OE 53030958AB