ACDelco 12736854 GM OE Heated Oxygen Sensor Assembly

The ACDelco 12736854 is a GM Original Equipment heated oxygen sensor assembly (O2 sensor) designed as a direct replacement for GM vehicles. As a genuine OE part, it is manufactured to the exact specifications set by General Motors, ensuring precise fit, form, and function with no modifications required.

This heated oxygen sensor is a critical feedback component in your vehicle's exhaust system. It continuously monitors the proportion of oxygen in exhaust gases, sending data to the engine control module (ECM) so it can fine-tune the air/fuel ratio to the optimal stoichiometric value of 14.7:1—balancing engine performance, fuel economy, and emissions output.

The integrated heater element allows the sensor to reach operating temperature quickly after a cold start, reducing the time the engine runs in open-loop mode and helping to minimize cold-start emissions.

Key Features:

• GM Original Equipment (OE) heated oxygen sensor assembly
• Monitors exhaust oxygen content to enable precise ECM air/fuel ratio control
• Integrated heating element for faster warm-up and reduced cold-start emissions
• Manufactured to GM OE specifications for guaranteed fit and function
• Helps maintain optimal engine performance, fuel efficiency, and emissions compliance
• Designed and validated by General Motors engineers for GM vehicles
• Direct OE replacement — no modifications or adaptations needed

Using a non-compliant or incorrect oxygen sensor can result in misfires, elevated nitrogen dioxide emissions, higher exhaust gas temperatures, or loss of engine power. The ACDelco 12736854 eliminates these risks by delivering the same quality and performance as the factory-installed component.