higherbro O2 Sensor Set for Hyundai & Kia — 2PCS Upstream + Downstream, Direct-Fit Replacement with Heater

higherbro 2PCS Oxygen O2 Sensor Set includes one upstream and one downstream sensor designed to restore accurate air-fuel readings for compatible Hyundai and Kia models.

This replacement pair from higherbro offers a direct-fit option engineered to match the electrical and mounting specifications of several Hyundai and Kia engines from 2014–2020. Sold as an upstream (pre-catalytic converter) and downstream (post-catalytic converter) combination, the set helps the vehicle’s engine control unit receive the oxygen-level signals it needs to adjust fuel delivery and monitor converter performance. The kit ships with a one-year unlimited mileage quality guarantee for added confidence.

Which vehicles and engines does this sensor set fit?

The higherbro 2PCS Oxygen O2 Sensor Set fits specific Hyundai and Kia models and engine sizes listed by year. It targets common 1.8L and 2.0L engines across Elantra, Kona, Tucson, and Forte lineups from mid-2010s to 2020. Always verify the OEM part number or connector style before ordering to ensure compatibility with your vehicle’s harness and position.

• 2014–2016 Hyundai Elantra 1.8L
• 2015–2016 Hyundai Elantra 2.0L
• 2018–2020 Hyundai Kona 2.0L
• 2019–2020 Hyundai Tucson 2.0L
• 2014–2016 Kia Forte 1.8L; 2019–2020 Kia Forte 2.0L

How do upstream and downstream O2 sensors differ and why get both?

Upstream and downstream sensors monitor oxygen levels at different points in the exhaust stream. The upstream sensor measures exhaust gases before the catalytic converter to help set fuel trim, while the downstream sensor checks converter efficiency after the catalyst. Replacing both sensors together ensures consistent signal timing and reduces diagnostic uncertainty when one fails and the other is worn.

• Upstream (sensor 1): feeds air-fuel ratio data to the ECU.
• Downstream (sensor 2): verifies catalytic converter performance.
• Buying the pair simplifies installation and troubleshooting.

What should I expect during installation and performance?

These sensors are designed as direct replacements for the factory units with matching thread sizes, heater elements, and electrical connectors. Installation typically requires basic hand tools and a safe lift or jack stands to access the exhaust locations; anti-seize may already be applied to threads. Once installed, the vehicle’s check-engine light related to O2 faults should clear after the ECU relearns signals or following a reset.

• Direct-fit connectors and factory-style threads for straightforward swap.
• Heater circuit compatible with original electrical systems.
• Expect smoother ECU adaptations once sensors provide correct voltage signals.

What warranty and quality support does higherbro provide?

This product includes a one-year unlimited mileage quality guarantee covering manufacturing defects under normal use. higherbro offers customer support for fitment questions and returns within the guarantee period; save your purchase documentation and inspect parts upon arrival. The warranty does not cover damage from improper installation, abuse, or aftermarket engine modifications.

• 1 Year Unlimited Mileage Quality Guarantee included.
• Support for fitment questions and replacement during the warranty window.
• Standard exclusions apply for misuse or modification-related failures.

Who is this for: drivers and independent mechanics who need a reliable, cost-effective replacement oxygen sensor pair for compatible Hyundai and Kia models from 2014–2020. This higherbro set suits owners addressing check-engine codes related to O2 sensors, those replacing aged sensors as preventative maintenance, and shops seeking a direct-fit aftermarket option backed by a one-year guarantee.