Mercedes-Benz A0101531628 Nox Sensor
Mercedes-Benz A0101531628 NOx Sensor – Emissions Control for Modern Diesel Engines
The Mercedes-Benz A0101531628 NOx sensor is a precision-engineered component designed to monitor nitrogen oxide (NOx) levels in the exhaust stream of Euro 6-compliant diesel engines. Used in a wide range of Mercedes-Benz commercial vehicles, including Actros, Arocs, and Atego models, this sensor plays a crucial role in the Selective Catalytic Reduction (SCR) system that converts harmful NOx gases into harmless nitrogen and water vapor. Ensuring that the NOx sensor functions accurately is essential not only for environmental compliance but also for vehicle performance, fuel efficiency, and regulatory inspections.
As emissions regulations become more stringent worldwide, particularly in the commercial transport sector, the A0101531628 NOx sensor has become an essential component in maintaining compliance and engine health.
What is a NOx Sensor?
A NOx sensor (short for Nitrogen Oxide sensor) is an electronic device mounted in a vehicle’s exhaust system. It measures the concentration of NOx in the exhaust gases and transmits this data to the Engine Control Unit (ECU). The ECU uses this real-time feedback to regulate the injection of AdBlue (urea solution) into the SCR system to reduce NOx emissions.
The Mercedes-Benz A0101531628 Nox Sensor is typically used either upstream or downstream of the SCR catalyst, depending on the engine architecture, to ensure optimal functioning of the emissions control process.
Technical Specifications
- Part Number: A0101531628
- Sensor Type: NOx sensor for SCR system (Euro 6 compliant)
- Operating Voltage: 12V or 24V (depending on application)
- Connector Type: 6-pin plug
- Cable Length: Typically 80–120 cm
- Sensor Tip: High-temperature ceramic with integrated heater element
- Operating Temperature: -40°C to +900°C
- Measurement Range: 0–500 ppm (parts per million) NOx concentration
Functionality
The A0101531628 NOx sensor consists of a sensing probe and a control module. The probe is exposed to the exhaust stream and uses electrochemical principles to detect NOx levels. The integrated heating element ensures rapid sensor warm-up and stable performance across temperature extremes.
The control module processes the data and communicates with the ECU via a digital CAN signal. When excessive NOx levels are detected, the ECU increases AdBlue injection. This precise control enables the SCR catalyst to convert up to 90% of NOx emissions into harmless nitrogen and water.
Key Benefits
1. Emissions Compliance
The Mercedes-Benz A0101531628 Nox Sensor ensures that Mercedes-Benz diesel engines remain compliant with Euro 6 and other international emission standards. It helps reduce environmental impact and prevents fines or registration restrictions related to emissions non-compliance.
2. Optimized AdBlue Consumption
Accurate NOx readings prevent under- or over-injection of AdBlue, which conserves fluid and ensures consistent SCR operation. Over-injection can lead to crystal buildup and system blockages, while under-injection risks compliance failure.
3. Engine Protection and Fuel Efficiency
By maintaining optimal NOx reduction, the sensor indirectly contributes to better combustion efficiency and reduced exhaust temperatures, extending the lifespan of emission system components like DPFs and turbochargers.
4. Reliable OEM Fitment
As an original Mercedes-Benz component, the A0101531628 is guaranteed to match factory specifications, ensuring seamless integration with the ECU and exhaust system. OEM sensors offer longer service life, better accuracy, and fewer diagnostic errors than aftermarket versions.
Common Symptoms of NOx Sensor Failure
- Check Engine Light or emissions system warning
- Excessive AdBlue consumption
- Failed emissions tests or inspections
- Increased exhaust smoke
- Reduced fuel economy or power
- Error codes related to NOx sensor circuit (e.g., P2200, P2201, P229F)
Timely replacement of a failing NOx sensor is critical to prevent further damage to the SCR system and to avoid vehicle derating or limp mode operation.
Installation and Maintenance Tips
- Ensure the engine is cool before replacing the sensor
- Use anti-seize compound on threads during installation
- Do not kink or twist the sensor wire
- Confirm proper seating and secure the connector to avoid moisture ingress
- Clear fault codes and reset the system using a compatible diagnostic tool
Mercedes-Benz recommends checking NOx sensors as part of routine emissions system inspections, especially after DPF cleaning or AdBlue system servicing.
Applications and Compatibility
The A0101531628 NOx sensor is widely used in:
- Mercedes-Benz Actros Euro 6
- Mercedes-Benz Arocs
- Mercedes-Benz Atego
- Certain Mercedes-Benz buses and special-purpose vehicles
Cross-referencing the sensor with the vehicle’s VIN or EPC system is recommended to confirm compatibility. The sensor may also be branded under subsidiaries of Daimler or appear as part of component kits.
Mercedes-Benz A0101531628 Nox Sensor
The Mercedes-Benz A0101531628 NOx sensor is a vital component in maintaining the environmental integrity and functional performance of modern diesel trucks. It ensures optimal operation of the SCR system, maintains emissions compliance, and protects engine components by regulating combustion conditions.
Fleet operators, workshop technicians, and procurement managers should prioritize genuine NOx sensors to ensure reliability, reduce maintenance costs, and uphold emissions standards. Investing in OEM components like the A0101531628 not only protects the vehicle’s emissions system but also ensures long-term operational efficiency.
To order the A0101531628 NOx sensor or for technical consultation, contact [Your Company Name] – your trusted partner in Mercedes-Benz emissions system solutions and OE truck parts supply.
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