Genuine OEM Nissan Exhaust Gas Temperature Sensor, part number 2263000Q3M. This sensor measures exhaust gas temperature, providing critical data to the engine control unit for managing fuel injection and ignition timing. It is typically located in the exhaust system before the catalytic converter. Accurate temperature readings are vital for maintaining optimal engine performance, fuel efficiency, and emissions control. Genuine OEM parts ensure precise calibration and reliable operation, preventing potential engine damage or performance issues.