The NOX (Nitrogen Oxide) sensor plays a vital role in monitoring exhaust emissions, particularly in hybrid Mercedes-Benz vehicles equipped with internal combustion engines. If your vehicle displays an emission fault or reduced power mode, a faulty NOX sensor might be the cause. AT Technicians offers accurate diagnostics and expert replacement services for these sensors. Using Xentry, we check sensor voltage ranges, compare data streams, and identify sensor ageing or heater circuit faults. We test the upstream and downstream NOX sensors individually to confirm the exact component needing replacement. Sensor replacement is carried out using genuine parts, and the ECU is updated to recognise the new unit. Post-replacement, we clear fault codes, verify live readings, and confirm restored emission compliance through on-road testing. NOX sensor issues can also affect DPF regeneration cycles, so it’s essential to resolve them promptly. Protect your hybrid’s efficiency and emission performance. Schedule a NOX sensor inspection today with AT Technicians Mercedes-Benz electrified vehicle specialists.