Walker Products 285-1002 NOx Nitrogen Oxide Sensor

The Walker Products 285-1002 is a genuine OE-quality nitrogen oxide (NOx) sensor designed to monitor nitrogen oxide emissions in vehicle exhaust systems. This critical emissions component provides real-time NOx level data to the engine control module (ECM), enabling precise control of emissions reduction systems.

Key Features:

• Genuine OE quality construction for reliable, long-lasting performance
• Measures nitrogen oxide concentration in exhaust gases
• Provides critical data for SCR (Selective Catalytic Reduction) system operation
• Helps ensure compliance with environmental emissions regulations
• Direct-fit replacement for failed or degraded NOx sensors
• Engineered to meet or exceed original equipment specifications

NOx sensors play a vital role in modern diesel and some gasoline engine emissions control systems. By accurately measuring nitrogen oxide levels both upstream and downstream of the catalytic converter or SCR system, these sensors enable the ECM to optimize diesel exhaust fluid (DEF) injection rates and ensure maximum emissions reduction efficiency. A faulty NOx sensor can trigger check engine lights, reduce engine performance, and cause vehicles to fail emissions testing.