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

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

Designed as a threaded, four-wire heated oxygen sensor, this A-Premium unit (reference 250-241276 / 250241276) fits many downstream locations across Hyundai and Kia lineups. It supplies the vehicle’s engine control system with reliable post-catalyst oxygen data, comes packaged in a protective box, and arrives with a 680 mm overall harness length and a female connector for plug-and-play installation on compatible vehicles. Before ordering, confirm vehicle specifics in the listing and review the special notes to ensure correct fitment.

Which Hyundai and Kia models does this downstream sensor fit?

This sensor covers downstream positions for a range of engines and model years across Hyundai and Kia. It supports four-cylinder and select V6 engines in specific years, and different downstream mounting locations (front, rear, right) are covered for some models.

• Hyundai: Genesis G70 (2019–2023 L4 2.0L), Santa Fe variations (2017–2020), Sonata variants (2015–2024), Tucson (2018–2021).
• Kia: Optima (2016–2020), Sorento and Sportage model/engine combos (2016–2022), Stinger (2018–2021), Telluride and Palisade downstream positions noted separately.
• Check listing vehicle selector and "Special Note" to match downstream position (front/rear/right) where required.

What are the technical specifications and connector details?

The sensor is a heated type with a threaded mounting and a four-wire harness designed to meet the electrical and mechanical requirements of the listed vehicles. Packaging includes a single sensor in a box for one-to-one replacement.

• Reference Number: 250-241276, 250241276.
• Wire Quantity: 4; Overall Length: 680 mm; Mounting Type: Threaded.
• Sensor Type: Heated; Connector Gender: Female; Package Quantity: 1x Oxygen Sensor.

How do I avoid buying the wrong oxygen sensor for my car?

To prevent fitment errors, always enter your vehicle year, make, model, engine and driveline in the listing selector before checkout. If the listing includes a "Special Note" or multiple downstream location options, cross-check those details and contact us with VIN or vehicle specifics when uncertain.

• Use the vehicle information box in the top-left of the listing before ordering.
• Verify downstream position (e.g., downstream front, downstream rear, downstream right) for models like Telluride and Palisade.
• Contact A-Premium support with VIN if fitment is unclear.

What should I expect when installing this sensor and why choose a heated unit?

The heated design brings the sensor up to operating temperature faster, improving exhaust monitoring after cold starts and helping the vehicle control system respond correctly. Installation is typically straightforward when the correct downstream position and connector match the vehicle harness.

• Heated element speeds warm-up time for accurate readings sooner after startup.
• Threaded mounting and female connector enable plug-and-play replacement on compatible models.
• Standard 680 mm harness length suits common downstream locations without modification.

Who is this for: This A-Premium downstream O2 oxygen sensor is aimed at owners and technicians who need a reliable, direct-replacement sensor for compatible Hyundai and Kia vehicles—especially when restoring exhaust sensor function, clearing related fault codes, or replacing a failed downstream sensor. Confirm fitment via the vehicle selector and special notes before purchasing, and contact A-Premium if you need help matching the sensor to your VIN or downstream position.