Mercedes-Benz E250 GL350 NOx Sensor 5WK96682B A0009050108 Emission Test

This NOx sensor is designed for 2012-2016 Mercedes-Benz E250 (W212/S212) and 2013-2016 Mercedes-Benz GL350 (X166) with OM642 diesel engines, precisely matching 2.1L and 3.0L displacements. Core function: monitor NOx concentration in exhaust in real time and provide data to the ECU to optimize SCR dosing of urea, ensuring compliance with Euro 6/China 5 emissions and avoiding environmental test failures. OEM number 5WK96682B (corresponding to Mercedes original A0009050108). Recommend checking the urea nozzle and upstream temperature sensor status during replacement. Replacement difficulty is medium; requires removing underside shields and exhaust sections; diagnose with professional tooling for sensor learning reset. The sensor uses KLP brand ceramic core with superior sulfur resistance, significantly reducing diesel DPF regeneration frequency.