QIYBONE Oxygen O2 Sensor Pair for Hyundai Accent Veloster & Kia Rio/Soul 2012–2018 — Upstream 234-5055 & Downstream 234-4568, OEM

QIYBONE two-piece oxygen sensor set (upstream 234-5055 and downstream 234-4568) replaces OE 39210-2B210 / 39210-2B220 to restore accurate air-fuel readings for compatible Hyundai and Kia 1.6L L4 models.

If your Check Engine light flags an O2 sensor fault or you want to maintain fuel efficiency and smooth idle, this matched upstream and downstream pair is made to fit specific Hyundai Accent, Veloster and Kia Rio/Soul vehicles from 2012–2018 (non-turbo 1.6L L4). Each sensor is built with stainless steel housings and high-temperature materials to resist exhaust conditions while providing OEM-style connector compatibility for straightforward replacement.

Will these sensors fit my exact vehicle and replace factory part numbers?

Yes — the QIYBONE pair is designed to match OE fitment for numerous Hyundai and Kia 1.6L L4 non-turbo models. Verify your model year and engine size before ordering, and compare the connector pictured with your original sensor to confirm match.

• Compatible vehicles: Hyundai Accent (2012–2017), Hyundai Veloster (2012–2017).
• Kia compatibility: Rio (2012–2018) and Soul (2012–2018), 1.6L L4 non-turbo.
• OE/Reference numbers matched: Upstream 234-5055 / 39210-2B210 family; Downstream 234-4568 / 39210-2B220 family.
• Confirm connector shape and pin count against your original sensor before installation.

How do these sensors affect fuel economy and engine performance?

Oxygen sensors monitor exhaust oxygen to help the engine control module adjust fuel delivery. Replacing a worn or failed sensor restores accurate air-fuel feedback, which can help normalize idle, reduce rich-running conditions and improve miles per gallon compared with a faulty sensor.

• Upstream sensor provides primary air-fuel ratio data for engine control.
• Downstream sensor helps monitor catalytic converter efficiency.
• Accurate readings support optimized fuel trim and combustion stability.
• High-temperature materials ensure consistent response under exhaust heat.

What are the installation steps and compatibility notes?

QIYBONE sensors are made to OEM dimensions with plug-and-play connectors, so installation is straightforward for anyone comfortable working under a vehicle. Typical replacement takes a few minutes per sensor using basic hand tools and an oxygen sensor socket; always let the exhaust cool first and follow vehicle-specific torque and safety guidelines.

• Compare the connector and thread style to your original sensor before purchase.
• Use penetrating oil if the old sensor is seized; allow cooling time after driving.
• Torque to manufacturer specs and avoid snagging the wiring harness post-install.
• Clear codes or run a drive cycle after replacement to verify proper operation.

What materials and quality features do these QIYBONE sensors include?

These oxygen sensors use stainless steel construction and heat-resistant internals to resist corrosion and prolonged high-temperature exposure. The design emphasizes reliable sealing and responsive sensing elements to maintain long-term stability in exhaust environments.

• Stainless steel housing for corrosion resistance and strength.
• High-temperature resistant sensing materials for longevity.
• Double protection sealing to reduce exhaust leaks at the thread area.
• Manufactured to match OEM electrical and mechanical specifications.

Who is this for: This two-piece QIYBONE oxygen sensor set is intended for DIYers and technicians restoring proper emissions and engine control on Hyundai Accent and Veloster 1.6L L4 models (2012–2017) or Kia Rio and Soul 1.6L L4 non-turbo models (2012–2018). Choose this pair if you need a matched upstream/downstream replacement that follows OEM fitment and offers durable construction for everyday driving.