A-Premium Downstream O2 Oxygen Sensor for Hyundai & Kia — Heated 4‑Wire, 680mm Cable

The A-Premium downstream O2 oxygen sensor is a direct-fit heated replacement designed to restore accurate exhaust oxygen readings for select Hyundai and Kia models.

This downstream (post-catalytic) oxygen sensor from A-Premium is built to match OE fitment and electrical connections for many Hyundai and Kia vehicles, including multiple Sonata, Santa Fe, Tucson, Genesis G70, Sorento, Sportage, Stinger, Palisade and Telluride applications. It uses a threaded, heated sensor design with a four-wire female connector and a 680 mm cable to make installation straightforward. Before ordering, verify your vehicle year, engine, drivetrain and sensor bank (front/rear/left/right) using the vehicle selector and the product's special note.

Which vehicles and engine types will this downstream O2 sensor fit?

This sensor covers a broad list of Hyundai and Kia models across various years and engines. Fitment includes four-cylinder turbo and naturally aspirated engines as well as certain V6 locations for downstream, downstream-front, downstream-rear and downstream-right positions. Always cross-check the listed reference numbers and your exact production date to ensure compatibility.

• Genesis G70 2019–2023 L4 2.0L (downstream)
• Hyundai Santa Fe/Tucson/Sonata models across 2015–2024 with specific L4 engine fits
• Kia Optima, Sorento, Sportage, Stinger, Telluride and Palisade fits for designated downstream locations
• Reference numbers: 250-241276, 250241276 for cross-referencing

How is the sensor built and what are the technical specs?

The A-Premium oxygen sensor is a heated, threaded unit designed for OEM-style replacement. It includes a durable cable assembly with a female connector to match factory harnesses and arrives boxed for protection. The heated element helps the sensor reach operating temperature quickly for reliable post-catalytic readings after startup.

• Wire quantity: 4 (heated sensor with ground and signals)
• Overall cable length: 680 mm to reach factory mounting points
• Mounting type: threaded for secure installation in the exhaust pipe or flange
• Connector: female to mate with vehicle harness; package includes one sensor

What should I check before ordering and installing this O2 sensor?

Confirming exact vehicle fitment information prevents returns and delays. Use the vehicle selector in the listing, read the product Special Note, and compare the reference number with your existing sensor. If you are unsure about fitment or bank position (downstream front/rear/right), contact the seller for guidance.

• Enter year, make, model and engine in the listing's vehicle selector
• Verify whether your sensor location is downstream, downstream-front, downstream-rear or downstream-right
• Compare part reference numbers 250-241276 / 250241276 with your old sensor
• Contact support if fitment is unclear or for installation tips

Who is this for: This A-Premium downstream O2 sensor is intended for DIY mechanics, independent repair shops and fleet owners who need an economical, OEM-style heated oxygen sensor replacement for supported Hyundai and Kia vehicles. It suits anyone replacing a failed or aging downstream sensor to correct exhaust monitoring, pass emissions checks or resolve post-catalyst fuel-trim and diagnostic trouble codes—provided they confirm exact fitment and sensor bank location before purchase.