ACDelco 12718675 Nitrogen Oxide NOx Sensor Upstream

The ACDelco 12718675 is a genuine GM OEM nitrogen oxide (NOx) sensor designed for diesel engines. This upstream sensor (Position 1) monitors nitrogen oxide levels in the exhaust system, providing critical data to the engine control module (ECM) to maintain optimal combustion efficiency and reduce harmful emissions.

Key Features:

• Genuine GM Original Equipment part engineered and tested by General Motors
• Upstream sensor location (Position 1) in exhaust downpipe
• Measures NOx concentration in exhaust gases for emission control
• Helps optimize fuel injection and engine performance
• Designed for GM Duramax L5P 6.6L diesel engines
• Direct replacement for OEM part numbers 12676705 and 12673516

Installation Notes:

• Vehicle computer reset procedure required after installation
• Replacement may resolve diagnostic trouble codes P2200, P2201, and P229F
• Factory specifications ensure proper fit and reliable operation

This sensor plays a vital role in emission compliance and engine efficiency by continuously monitoring exhaust gas composition. Replacing a faulty NOx sensor can restore proper engine performance, eliminate check engine lights, and ensure your vehicle meets environmental regulations.