A-Premium 2-Pack Upstream O2 Oxygen Sensors for Chevrolet — Heated 4-Wire Threaded Direct-Fit

The A-Premium 2-pack heated upstream oxygen sensors replace faulty O2 sensors in many GM vehicles to restore accurate exhaust monitoring and emissions performance.

These threaded, four-wire oxygen sensors from A-Premium are designed as direct-fit replacements for a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac and Saturn models. Each kit includes two heated sensors with female connectors packaged in protective boxes. They match common aftermarket reference numbers and vehicle applications for upstream or upstream/downstream locations depending on year and model.

Which vehicles will these A-Premium O2 sensors work with?

These sensors cover many General Motors platforms across the 2003–2014 model years. Fitment varies by model and application—some years require upstream placement while others accept upstream or downstream sensors. Always confirm compatibility using your vehicle's year, make, model and the OEM/reference numbers listed.

• Covers Chevrolet, GMC, Cadillac, Buick, Pontiac and Saturn models from early 2000s through mid-2010s.
• Includes fitments for Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Impala, Malibu and more.
• Some applications specify upstream-right or downstream positions—check vehicle-specific notes.

What are the key technical specifications of the A-Premium sensors?

These oxygen sensors are heated, four-wire units with a threaded mounting that bolts into the exhaust system. They come packaged in pairs with female electrical connectors to match factory wiring harnesses and are intended as direct-replacement parts for compatible GM models.

• Wire count: 4 (heated circuit plus signal and ground).
• Mounting: threaded for standard O2 sensor ports.
• Connector: female terminal end to mate with factory harnesses.
• Package: two oxygen sensors per boxed kit.

How do I confirm fitment and reference compatibility?

Check the sensor reference numbers and match them to your vehicle’s OEM part number or existing sensor. The kit lists several cross-reference numbers used by aftermarket catalogs; compare these to the part stamped on your old sensor or the parts database for your vehicle.

• Reference numbers included for cross-checking: 250-24470, 25024470, 12569429, 12573005 and others.
• Confirm whether your vehicle requires upstream, downstream or a specific side (e.g., upstream right) before ordering.
• If uncertain, consult an OEM parts guide or a repair professional with your VIN.

Why choose a heated four-wire replacement rather than a universal sensor?

Heated four-wire sensors reach operating temperature quickly and provide stable oxygen readings to the engine control system, which helps maintain proper air-fuel ratios and emissions control. A direct-fit design avoids splicing or adapter harnesses and simplifies installation.

• Faster warm-up reduces incorrect fuel trims on cold start.
• Direct-fit female connector minimizes electrical compatibility issues.
• Threaded mount matches factory sensor ports for straightforward replacement.

Who is this for: The A-Premium 2-pack upstream oxygen sensor kit is for DIY mechanics, independent shops and fleet maintainers who need reliable, affordable O2 replacements for GM vehicles. Choose this kit if your car or truck shows an OBD-II code for a faulty upstream O2 sensor, if you need matched sensors for both sides, or if you want a boxed pair that fits many Chevrolet, GMC, Cadillac, Buick, Pontiac and Saturn applications. Always verify fitment against your specific model year and engine configuration before purchasing to ensure correct sensor position and connector match.