Dongfeng VL NOx sensor assembly 3615710-T39H0 for sale

Equipped with advanced electrochemical sensing technology (or laser-based sensing, depending on design), this sensor assembly delivers ultra-accurate detection of nitrogen oxide (NOx) concentrations in the truck’s exhaust gas—with a measurement range of typically 0-5000 ppm (parts per million) and an error margin of less than ±5%. It continuously monitors exhaust NOx levels and transmits real-time data to the ECU, which then adjusts the urea injection amount (in the SCR system) to reduce NOx emissions to meet strict regulatory standards (e.g., China’s National VI Emission Standard, Euro VI). This precision is critical for avoiding emission test failures, fines, or vehicle operation restrictions—making it an essential replacement part for Dongfeng VL trucks operating in emission-controlled areas

Built to withstand the extreme conditions of exhaust systems (high temperatures, vibration, and chemical exposure), this NOx sensor assembly features a robust design. The sensing element is enclosed in a high-temperature-resistant ceramic housing (capable of withstanding continuous temperatures up to 600°C and short-term peaks of 800°C) that protects it from thermal shock and corrosion. The sensor’s outer shell is made of stainless steel (316L grade), which resists rust and degradation from exhaust gases (e.g., sulfur compounds) and road debris. Additionally, the electrical connector is sealed with a silicone O-ring and rated IP6K9K for dust and water resistance, ensuring reliable signal transmission even in rainy or dusty operating environments. These features extend the sensor’s service life to 150,000-200,000 km under normal use—reducing frequent replacement costs for buyers

Designed for real-time emission control, this sensor assembly boasts a fast response time of less than 2 seconds (from detecting a NOx concentration change to transmitting data to the ECU). This rapid feedback allows the SCR system to adjust urea injection instantly, preventing temporary NOx spikes that could lead to emission non-compliance. The sensor also maintains stable performance over time: it undergoes a pre-calibration process at the factory (with data stored in its internal memory) that minimizes drift in detection accuracy, even after long-term use. Unlike low-quality sensors that require frequent re-calibration, this OE unit retains its precision without additional maintenance—saving time for truck operators and ensuring consistent emission performance

For added convenience, this NOx sensor assembly is sold as a fully complete unit, including the sensor probe, electrical pigtail (wiring harness), mounting gasket, and installation hardware (e.g., lock nut). The pre-attached wiring harness is cut to the exact length required for Dongfeng VL models, eliminating the need for trimming or splicing. The mounting gasket (made of heat-resistant graphite) ensures a tight seal between the sensor and exhaust pipe, preventing exhaust gas leaks. Even for non-professional installers, the installation process takes only 20-30 minutes with basic tools (a wrench and socket set): simply remove the old sensor, clean the exhaust pipe thread, install the new gasket, and torque the new sensor to the specified OE torque (typically 30-40 N·m). This hassle-free replacement makes it an ideal choice for emergency repairs or scheduled maintenance