The Genuine Ford TIMING CHAN Tensioner 4R8Z6L266A is a direct replacement part designed specifically for 18-21 Ford F-150 trucks with a 3.0L diesel Power Stroke engine. This OEM product comes with a 1-year manufacturer warranty, ensuring quality and performance. The tensioner is genuine Ford, making it a reliable choice for maintaining the engine's timing chain system. This product includes part reference #19 on the diagram, providing a perfect fit for your vehicle.