This NOx sensor has been made to match the original equipment sensor on certain vehicle years, makes and models, properly restoring nitrogen oxide detection to comply with emissions regulations. Direct replacement - this replacement NOx sensor matches the function and performance of the original sensor on specified vehicles Restores performance - properly repairs nitrogen oxide detection to comply with regulations Application specific - reverse engineered from the original design on certain vehicle years, makes and models Trustworthy quality - backed by team of engineers and quality specialists in the United States