• ACDelco Professional O2 Sensor-Primary Image


  • Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
  • Coverage available for GM and non-GM applications
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function



ACDelco GM Original Equipment O2 Sensor
GM Original Equipment Mass Air Flow Sensor
GM Original Equipment Manifold Absolute Pressure Sensor
ACDelco Emissions

An ACDelco Professional, premium aftermarket Oxygen (O2) Sensor is the high quality replacement ideal for many vehicles on the road today. It is a special feedback sensor on your vehicle’s exhaust system. This sensor measures the proportion of oxygen in the exhaust gases. Using this measurement, the engine management computer can adjust the air/fuel ratio near the optimum value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. This premium aftermarket replacement oxygen sensor is manufactured to meet your expectations for fit, form, and function.


12 Months/12,000 Mile limited warranty*

*Whichever comes first. To the original retail purchaser. Parts only; installation not included. See your local retailer or independent service center that offers ACDelco parts for details.


Can I replace an ACDelco Oxygen (O2) Sensor on my own?

• Yes, but with today’s computerized engine systems, maintaining your vehicle’s exhaust and emissions system is best left to a professional technician.

Is there a problem when my ‘Check Engine Light’ turns on?

• Yes, it could be due to a contaminated sensor probe, broken sensor body, internal sensor failure, or external electrical failure.

Can ACDelco Oxygen (O2) Sensors help provide better gas mileage for my vehicle?

• Yes, ACDelco Oxygen (O2) Sensors are the primary devices on your vehicle that measure the proportion of oxygen in emission and gases with the amount in outside air. Using this measurement, the vehicle computer can adjust the air fuel ratio to the optimum value of 14.7:1. At this ratio engine performance, emissions, and fuel economy are optimized.



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