This engine rocker cover assembly is designed for use with X-TRAIL T30 models from 2001 to 2013.It includes part numbers 132648H303, 132648H301, 132648H300, and 132648H302.The assembly functions as a sealed enclosure for the rocker arm mechanism, helping to maintain proper oil pressure and prevent leaks.It is built to meet standard specifications for fitment and performance.Installation requires standard mechanical tools and follows standard procedures.This part is a direct replacement for the component.