2018-2019 GMC Sierra 2500 3500 6.6L Turbo 12680215 12680619 Nox Nitrogen Oxide Sensor

The exhaust readings became consistent after the sensor completed its initial drive cycle. Its connector clicked in securely, and the warning light has stayed off during daily use.

Live sensor data began changing normally instead of staying fixed at one value. The truck completed its emissions self-check and has driven normally since the repair.

The sensor fit correctly and worked immediately after installation. The engine idles smoothly again, throttle response is better, and the warning light is gone.

The airflow meter fit the factory intake and worked immediately after installation. My Miata now idles smoothly and responds much better when accelerating.

The sensor fit the original intake connection and worked immediately after installation. The idle is stable again, and throttle response has noticeably improved.