New Valeo NOx Sensors

A New-to-Range Launch for the European Market 

Valeo is launching its new range of NOx sensors, designed to meet the growing demands of modern emission management systems. Comprising 100 new-to-range references on the European market, this comprehensive lineup is built to deliver the precision and reliability that today’s workshops and distributors require.
The new references also complement Valeo’s existing sensor portfolio and reflect the company’s deep understanding of European fleet composition across a wide variety of makes and models.

Extensive Coverage for Passenger Cars in Europe

With coverage of more than 40 million passenger cars in Europe, Valeo enables distributors and workshops to respond effectively to market needs. This breadth of coverage means fewer gaps in the catalogue and greater confidence that the right part is always at hand whatever the vehicle.

The function of a NOx Sensor

A NOx sensor is an electronic device that measures the concentration of nitrogen oxides (NO) in the exhaust gases of internal combustion engines, primarily diesel engines. It is used to monitor and optimize the performance of the exhaust aftertreatment system.
The combustion in vehicles produces Nitric oxide (NO), which converts into Nitrogen dioxide (NO₂) when mixed with oxygen (O) at high temperatures. NO₂ is a harmful air pollutant.
NOx sensor works in combination with the (SCR) system to reduce the influence of NO₂ pollution. 

Technology Designed for Performance and Durability

Valeo NOx sensors have been developed with particular attention to resistance to engine vibrations and high temperatures. These characteristics guarantee optimal performance, even in demanding operating conditions a critical requirement given the extreme environment in which exhaust aftertreatment components must function.

Compatible with Euro 6 vehicle applications, they are a key component of exhaust gas management systems. Euro 6 vehicles have at least one NOx sensor, before and after the SCR catalytic. As global emissions regulations continue to tighten, the need for sensors that can keep pace with increasingly strict standards has never been greater. Valeo’s engineering expertise ensures this new range is not only compliant today, but built with the future in mind. 

How the NOx Sensor System Operates

The upstream NOx sensor continuously monitors the NOx content of the exhaust gas and sends a signal to the Engine Control Unit (ECU). The ECU then calculates the precise urea dose required to neutralise the NOx within the SCR catalyst. The urea injector sprays this calculated amount into the hot exhaust stream, triggering a chemical reaction that converts NOx into harmless nitrogen and water.

A downstream NOx sensor verifies the efficiency of this SCR reaction by measuring NOx concentration after the catalyst, allowing the ECU to adjust urea dosing in real time and maintain emissions within regulatory limits. In some applications, a single NOx sensor positioned after the SCR catalyst may be used.

Road-Tested for Real-World Reliability

Valeo NOx sensors are road-tested during 700 hours according to real driving situations to validate the reliability of the sensors. This is not laboratory testing in isolation it reflects the genuine demands placed on sensors during everyday operation across a wide range of conditions and duty cycles.

Every sensor in the range undergoes thorough validation to confirm it meets the demands of real-world driving, ensuring the robustness and long-term performance that workshops and their customers depend on.

Concrete Benefits for Professionals and Drivers

The Valeo NOx sensor range delivers a compelling set of advantages:

• High-precision real-time measurement for optimal emissions control
•  Strategic component of modern engine emission control systems
• Continuous improvement to meet ever-changing global emissions standards
• Tested to exacting quality standards, ensuring robustness, reliability, and long-term performance

Valeo: A True Service Partner for Workshops

Beyond the product itself, Valeo is a true partner for workshops a one-stop-shop supplier with over 2,000 sensors in its portfolio. Valeo supports professionals with comprehensive solutions that go beyond the part itself, including:

• Dedicated technical support from specialists who understand the product and the application
• Expertise to facilitate installation and maintenance, helping workshops work efficiently and correctly first time

Quality and Reliability at the Heart of Valeo’s Commitment

Valeo NOx sensors are tested to exacting quality standards, ensuring robustness, reliability, and long-term performance. With this new range, Valeo is reinforcing its commitment to provide innovative, reliable solutions that comply with current and future environmental requirements.

As emissions legislation continues to evolve, Valeo remains focused on equipping the aftermarket with the products and knowledge needed to keep vehicles compliant, efficient, and on the road.

For more information on the Valeo NOx sensor range, visit valeoservice.com.