10 Best Ac Delco O2 Sensor of 2025

Tested and Reviewed: Top 10 Ac Delco O2 Sensor deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

GM GENUINE PARTS

GM Genuine Parts 213-3866 (12583804) Heated Oxygen Sensor

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Editor's bottom line:

“This ac delco o2 sensor is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
GM-recommended replacement part for your GM vehicles original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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Picked by 397 people today

9.5

GM GENUINE PARTS

GM Genuine Parts 213-4229 (12609457) Heated Oxygen Sensor

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Main Highlights

Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
GM-recommended replacement part for your GM vehicles original factory component.Connector Gender: Female
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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9.5

GM GENUINE PARTS

GM Parts ACDelco Genuine Heated Oxygen Sensor - 12657188

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Main Highlights

Genuine AC Delco Heated Oxygen Sensor - 12657188
Item Package Dimension: 8.34L x 3.18W x 2.99H inches
Item Package Weight - 0.2 Pounds
Item Package Quantity - 1
Product Type - ELECTRONIC SENSOR

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9.2

GM GENUINE PARTS

GM Genuine Parts 213-1702 (12587785) Heated Oxygen Sensor

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Main Highlights

Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
GM-recommended replacement part for your GM vehicles original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function
Connector Gender: Male
Fits: 2003-2005 GMC Yukon XL 1500,2003-2005 GMC Yukon,2003-2005 GMC Sierra 1500,2003-2005 Chevrolet Tahoe,2003-2005 Chevrolet Suburban 1500,2003-2005 Chevrolet Silverado 1500,2003-2005 Chevrolet Avalanche 1500,2003-2005 Cadillac Escalade

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9.0

BLPextrm

Oxygen O2 Sensor Upstream and Downstream Fits for Chevy Silverado 1500 2014-2017, Suburban Tahoe 2015-2018, for GMC Sierra 1500 2014-2017, Yukon 2015-2018, Replace 234-4940, 234-4974

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Main Highlights

Application: Oxygen Sensor Upstream Downstream Fits for Chevy Silverado 1500 4.3L 5.3L 6.2L 2014-2017, for Chevy Suburban 5.3L 2015-2018, for Chevy Tahoe 5.3L 2015-2018, for GMC Sierra 1500 4.3L 5.3L 6.2L 2014, for GMC Yukon XL 5.3L 6.2L 2015-2018
Replacement Part No: Oxygen Sensor Upstream Downstream Replace 234-4940 , 12666612 , 21581 , F00HL00421 , 18187 , 12657188 , 234-4974 , 12655678 , 21075 , 12661898 , 12643708 , F00HL00410 , 18054. Before purchasing an O2 sensor, please carefully check your vehicle's year, brand and model, image, and part number to confirm compatibility
Oxygen Sensor Makings: Our oxygen sensor is made of carefully selected materials, capable of reaching temperatures up to 650 degrees Celsius, with faster response time and longer lifespan
Role of the Oxygen Sensor: Oxygen sensors are critical components in maintaining the health and performance of your vehicle's engine can accurately detect and help ensure continuous monitoring and operation of your engine. O2 sensors solve the problems of unstable idle, frequent stalling, and poor acceleration in your car
Efficieent Problem Solving: If you encounter any dissatisfaction with the performance of your oxygen sensors, we are committed to providing prompt assistance. Simply send us an email detailing the issue, and our dedicated team will work diligently to resolve your concerns. Whether it involves oxygen sensor replacement, or troubleshooting, we prioritize your satisfaction and aim to ensure your o2 sensor functions as expected

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8.8

GM GENUINE PARTS

GM Genuine Parts 213-4537 (12606671) Heated Oxygen Sensor

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Main Highlights

Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
GM recommended replacement part for your GM vehicles original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function
Fit type: Vehicle Specific

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8.6

ACDelco

ACDelco Gold 19473526 Exhaust Oxygen Sensor

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Main Highlights

The sensor detects oxygen content in the exhaust gases and provides this information to the engine ECU
This information is used by the ECU controller to help keep the engine running smooth, and help optimize emissions and fuel economy
Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Premium aftermarket replacement part
Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

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8.3

Delphi

Delphi Oxygen Sensor - ES20013

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Main Highlights

Patented planar sensor construction and design for long lasting, reliable operation over the life of the sensor
Unique sensor-coatings protect the sensor elements from contaminants that can trigger "check-engine" lights and premature sensor failure
Brand: Delphi
International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions

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8.1

Bosch

BOSCH 15284 Premium OE Fitment Oxygen Sensor - Compatible with Select Cadillac Escalade; Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer EXT; GMC Envoy, Sierra, Yukon, + More

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Main Highlights

[INNOVATIVE TECHNOLOGY] - Every Bosch Oxygen Sensor benefits from the technological and manufacturing experience gained from decades of production since first inventing the Oxygen Sensor in the late 1960's, ensuring long-lasting performance
[FACTORY TESTED] - Seared appearance of protection tube is a result of a 100 percent fully functional quality test to ensure every Bosch manufactured sensor meets Bosch's rigorous standards for quality and performance
[STAINLESS STEEL BODY] - Exclusive double laser-welded stainless steel body is totally submersible and sealed tight to protect against damage from exhaust emissions - ensuring longer sensor service life
[FAST ACTING HEATER] - Fast-acting heater optimizes sensor operation on Planar and 3, 4, and 5 wire Thimble type sensors allowing the oxygen sensor to reach its operating temperature quicker - within seconds - for optimum performance
[READY TO INSTALL] - True Direct-fit OE connectors and harnesses, along with threads pre-coated with anti-seize compound right out of the box, make installation simple and easy
Compatible with select vehicles (Note: engine may affect fitment - verify specific fitment details, including sensor position, with fit checker above): BUICK: 2005 Rainier; CADILLAC: 2004 CTS, 2003-05 Escalade; CHEVROLET: 2003-05 Avalanche 1500
Compatible with (continued): CHEVROLET: 2003-05 Silverado 1500, 2005 SSR, 2003-06 Suburban 1500, 2003-05 Tahoe, 2005 Trailblazer EXT; GMC: 2005 Envoy, 2005 Envoy XL, 2005 Envoy XUV, 2003-05 Sierra 1500, 2003-05 Yukon
Compatible with (continued): GMC: 2003-05 Yukon XL 1500; ISUZU: 2005 Ascender

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8.1

GM GENUINE PARTS

GM Genuine Parts 12659516 Heated Oxygen Sensor

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Main Highlights

This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Detects oxygen content in the exhaust gases to help optimize emissions
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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Our Best Overall Choice

Best Choice

9.7

GM GENUINE PARTS

GM Genuine Parts 213-3866 (12583804) Heated Oxygen Sensor

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Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
GM-recommended replacement part for your GM vehicles original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

Show Price

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