A-Premium Downstream O2 Oxygen Sensor for Hyundai Kia — B1S2 4-Wire Heated, 700mm Direct-Fit

The A-Premium Downstream O2 Oxygen Sensor (B1S2) is a direct-fit, heated 4-wire replacement sensor designed to restore accurate downstream oxygen readings for select Hyundai and Kia 1.6L/1.4L engines.

This replacement oxygen sensor mounts downstream of the catalytic converter (Bank 1 Sensor 2) and is built to factory-style specifications: four wires, a threaded mounting, a 700 mm overall length, and a male connector. It fits many Hyundai and Kia models from the 2012–2022 model years and ships in a protective box with a one-year unlimited-mileage warranty. The sensor is intended as a straightforward bolt-in option for technicians and DIYers who need to replace a failed downstream O2 sensor without modifying wiring or exhaust components.

Which vehicles will this A-Premium downstream O2 sensor fit?

This sensor is specified as a downstream (B1S2) replacement for a broad set of Hyundai and Kia compact and midsize vehicles. Check the model year and engine code before ordering to confirm exact compatibility.

• Hyundai: Accent (2012–2019) 1.6L; Elantra (2017–2020) 1.4L and (2017–2022) 1.6L; Elantra GT (2018) 1.6L; Ioniq (2017–2022) 1.6L; Kona (2018–2021) 1.6L; Sonata (2015–2019) 1.6L; Tucson (2016–2018) 1.6L; Veloster (2012–2017) 1.6L.
• Kia: Forte Koup (2014–2016) 1.6L; Forte5 (2014–2018) 1.6L; Niro (2017–2021) 1.6L; Optima (2016–2020) 1.6L; Rio (2012–2015, 2018–2019) 1.6L; Soul (2012–2020) 1.6L.

How does this sensor match OEM specifications?

The A-Premium sensor is manufactured to mimic the key physical and electrical attributes of the original unit so it installs and communicates correctly with the vehicle’s engine control module. It is a heated sensor with four wires and a threaded mounting, designed to plug into the existing harness and thread into the factory bung without adapters.

• Wire count: 4 (heated design supports faster warm-up).
• Mounting: threaded for direct fit into factory exhaust bung.
• Connector: male plug to mate with factory harness.
• Overall length: 700 mm for proper routing and reach.

What are the reference numbers and packaging details I should note?

Use the listed reference numbers to cross-check compatibility with parts catalogs or dealer listings. The sensor ships boxed as a single unit with A-Premium support and warranty documentation included.

• Common reference numbers: 15733, 16754, 1900-545760, 250-24982, 234-4568.
• Package quantity: 1x oxygen sensor in protective box packaging.
• Connector gender: male; ensure harness match before purchase.

What warranty and support come with the A-Premium O2 sensor?

A-Premium includes a one-year unlimited-mileage warranty on this oxygen sensor and offers customer support to help with fitment questions. The warranty covers manufacturing defects for the stated period but does not replace normal wear or damage from improper installation.

• Duration: 1-Year unlimited-mileage warranty for peace of mind.
• Support: customer assistance available for fitment and product concerns.
• Condition: brand-new, boxed replacement part for direct installation.

Who is this product for? Automotive owners and mechanics who need a reliable downstream O2 sensor replacement for Hyundai and Kia vehicles with 1.4L and 1.6L engines will find this A-Premium sensor suited to their needs. It is intended for people comfortable verifying vehicle fitment, performing basic exhaust sensor replacement, or instructing a technician; the sensor supplies OEM-style connectivity and dimensions for a hassle-free swap and diagnostic stability.