The 07K 903 315T is a Gates OE-quality accessory drive belt tensioner for Volkswagen models equipped with the 2.5L inline 5-cylinder (BGP/BGQ) engine — including the Beetle, Golf, Jetta, Passat, and Rabbit. As the current VAG supersession of 07K 903 315S / N / J / G, this tensioner maintains correct serpentine belt tension through a durable spring mechanism and precision sealed pulley bearing, keeping belt-driven accessories running quietly and reliably with no modifications required.