HQPASFY Oxygen O2 Sensor Pair for Hyundai & KIA 1.6L — Upstream 234-5055 + Downstream 234-4568, OEM-fit Stainless

HQPASFY Oxygen O2 Sensor pair (234-5055 upstream + 234-4568 downstream) is a direct-fit replacement set for Hyundai and KIA 1.6L vehicles to restore accurate air–fuel sensing and stable engine performance.

If your engine light, rough idle, or reduced fuel efficiency points to a worn oxygen sensor, this two-piece kit replaces both upstream and downstream sensors with parts that match OEM fitment for selected Hyundai Accent, Veloster, KIA Rio, and Soul models. Built from corrosion-resistant stainless steel with durable laser welds and high-temperature components, these sensors are intended to detect exhaust oxygen levels and send accurate signals to the engine control unit so the fuel mixture can be adjusted.

Which vehicles and engines does this O2 sensor set fit?

This HQPASFY sensor pair is compatible with Hyundai and KIA models that use a 1.6L inline-4 engine from the specified years. Verify your VIN or existing part numbers to confirm fitment before ordering.

• Hyundai: Accent (2012–2014), Veloster (2012–2014)
• KIA: Rio (2012–2014), Soul (2012–2015)
• Replaces upstream 234-5055 and downstream 234-4568 family numbers

How do these sensors match OEM parts and part numbers?

HQPASFY sensors are engineered to replace common OE references so installation and diagnostic behavior remain consistent with factory components. Cross-reference the listed replacement numbers against your vehicle’s original sensors.

• Upstream replaces: 234-5055, 2345055, 24326, 39210-2B210, 39210-2B410
• Downstream replaces: 234-4568, 2344568, 39210-2B220
• Designed for direct-fit installation with OEM-style connectors and threads

What construction and performance features should I expect?

The sensors are built for durability in high-temperature exhaust environments and to provide consistent voltage/signal feedback to the ECU. Materials and assembly focus on corrosion resistance and sealing to extend service life.

• Stainless steel housing with double laser welds for tight sealing
• High-temperature, corrosion-resistant sensing element
• Electrical connector compatible with factory harness; ready for direct swap

When should I replace my oxygen sensors?

Replace sensors when diagnostic trouble codes indicate an O2 issue, or when drivability symptoms appear; replacing both upstream and downstream at once can restore proper monitoring and reduce repeat labor.

• Check engine light codes P0130–P0167 may indicate sensor faults
• Noticeable rough idle, hesitations, or reduced fuel economy
• Preventive replacement at high mileage or when one sensor fails

Who is this for: This HQPASFY oxygen sensor pair is suited for owners and technicians working on Hyundai Accent or Veloster (2012–2014) and KIA Rio or Soul (2012–2015) with the 1.6L engine who need a cost-effective, direct-fit replacement. It’s aimed at people who want OEM-style compatibility, durable construction for high-heat exhaust use, and straightforward swap-in installation. If you need exact part-number matching, accurate air–fuel sensing, and a backed product, this set is built to be a reliable replacement option with a 24-month warranty and customer support for fitment questions.