Mercedes-Benz BENZ Genuine NOx Sensor A0091530628 5WK96656A Emission System

This oxygen sensor is designed for Mercedes-Benz W204 C-Class, W212 E-Class, W166 ML, and W207 E-Coupe with OM642/OM651 diesel engines, 2.1L–3.0L. Real-time NOx monitoring and feedback to ECU to optimize SCR urea injection; ensures emissions compliance and improves fuel economy. OEM A0091530628 and 5WK96656A correspond; direct replacement with no programming. Installed behind the exhaust after the catalytic converter; torque to 45 Nm with professional torque wrench to avoid sealing ring damage. OEM replacement by KLP with ISO/TS16949 certification; about 60% lower cost than dealers; suitable for bulk procurement to reduce workshop inventory costs.