A-Premium O2 Oxygen Sensor Compatible with Hyundai, Kia & Genesis — Heated 4‑Wire, 450mm Lead

The A-Premium O2 oxygen sensor is a direct-fit, heated replacement sensor designed to restore proper exhaust monitoring and efficiency on select Hyundai, Kia and Genesis models.

This downstream and upstream oxygen sensor from A-Premium matches factory fitment and electrical connections for many Hyundai, Kia and Genesis vehicles. Built with a threaded housing, a four‑wire heated design and a 450 mm lead, the sensor is packaged for a simple swap—no vehicle reprogramming needed in most cases. Review the vehicle compatibility notes and reference numbers before ordering to ensure you select the correct downstream or upstream location for your application.

Which vehicles and positions does this A-Premium O2 sensor fit?

This sensor covers a wide range of late‑model Hyundai and Kia cars and SUVs as either downstream or upstream units, plus specific fitment for select Genesis models. Fitment differs by engine, model year, and sensor location (downstream front, downstream rear, upstream front, upstream right).

• Downstream: Hyundai Santa Fe (2019–2020 L4 2.4L & 2.0L), Sonata (2015–2019 various 2.0L/2.4L), Tucson (2018–2021 2.4L); Kia Optima, Sorento, Sportage variants.
• Downstream Front: Hyundai Palisade (2020–2024 V6 3.8L); Kia Telluride, Sedona V6 listings.
• Downstream Rear / Upstream positions: Kia Cadenza, Sorento V6, K900 and Genesis V6 examples.
• Reference numbers: 250-241283 / 250241283 — verify before purchase.

How does the four‑wire heated design benefit performance and diagnostics?

The four‑wire construction includes power and ground for the heater circuit plus signal and ground for the sensing element. The heater helps the sensor reach operating temperature faster, improving response after cold starts and allowing the vehicle’s engine control unit to regulate air/fuel more quickly. Faster stabilization reduces emissions during warm-up and helps the car pass OBD-II readiness checks sooner.

• Heated sensor: faster warm-up and quicker closed‑loop operation.
• Four wires: separate heater and signal circuits for reliable readings.
• Threaded mounting: straightforward mechanical fit like original equipment.

What are the mechanical and electrical specs I need to know before buying?

The A-Premium sensor is supplied as a single unit in a protective box with a 450 mm overall cable length and a female connector to match factory harnesses. It uses a threaded installation and is rated as a heated oxygen sensor, suitable for downstream or upstream roles depending on the listing. Confirm the connector style and wire count against your vehicle harness to prevent installation issues.

• Wire quantity: 4 (signal, ground, heater power and heater ground).
• Overall cable length: 450 mm for correct reach to vehicle harness.
• Mounting: threaded sensor body for OEM-style installation.
• Connector gender: female; packaged quantity: one sensor.

How easy is installation and what tools are typically required?

Installation is designed to be straightforward for anyone comfortable working on exhaust components. Most installations only require basic hand tools: an oxygen sensor socket or open wrench, anti-seize on threads if desired, and a jack/stands to access the sensor location. No specialized programming tools are usually necessary after replacement.

• Typical tools: O2 sensor socket or 22 mm wrench, ratchet, penetrating oil for stuck sensors.
• Preparation: allow exhaust to cool and disconnect battery if preferred for safety.
• After install: clear any stored trouble codes and verify readiness with an OBD-II scanner.

Who is this for? Mechanics, DIY enthusiasts and service shops seeking a cost‑effective replacement oxygen sensor that mirrors OEM fit and function. If your Hyundai, Kia or Genesis is showing an O2 sensor fault, poor fuel economy, or a check engine light tied to oxygen sensor codes, this A-Premium heated sensor provides a direct-fit option. Always confirm the correct sensor location and reference number for your exact model and year before purchasing, and contact seller support if you need compatibility help.