QIYBONE O2 Sensor Pair Upstream & Downstream for Hyundai/KIA 2009–2016 — OEM Fit Stainless Steel

Two QIYBONE oxygen sensors (upstream 234-5029 and downstream 234-4238) provide direct-fit air/fuel monitoring for compatible 2009–2016 Hyundai and KIA 2.0L/2.4L engines.

This pair of replacement O2 sensors is built to match OEM fit and function for a range of Hyundai and KIA models, including Sonata, Tucson, Santa Fe, Optima, Sorento, Sportage, Forte lines and Rondo. Constructed from stainless steel and high-temperature materials with improved sealing, the sensors measure exhaust oxygen to help the engine control module adjust fuel trim. They arrive as a plug-and-play set intended for straightforward swap-out and are offered with reference OE part numbers for quick verification.

Which vehicles and engines will these sensors fit?

These QIYBONE sensors cover many popular Hyundai and KIA models equipped with 2.0L and 2.4L four-cylinder engines across model years roughly 2009–2016. Always verify compatibility against your original part number and connector before purchase.

• Hyundai: Sonata (2009–2015 2.4L), Tucson (2010–2015 2.4L; 2011–2014 2.0L), Santa Fe (2010–2016 2.4L).
• KIA: Forte/Forte Koup/Forte5 (2010–2013, 2012–2013), Optima (2011–2016 2.4L, 2013–2016 2.0L), Rondo (2009–2012), Sorento (2011–2015 2.4L), Sportage (2011–2016 2.4L).
• Check OE numbers: upstream 234-5029 and downstream 234-4238 variants listed for confirmation.

How do these sensors impact engine performance and fuel economy?

Oxygen sensors report exhaust oxygen levels so the engine control unit can set the correct air/fuel ratio. A properly functioning upstream and downstream pair helps stabilize combustion, which can improve throttle response, reduce rough idling, and support consistent fuel economy over time.

• Upstream sensor monitors combustion for fuel trim corrections.
• Downstream sensor verifies catalytic converter efficiency.
• Timely replacement prevents long-term fuel trim drift and emissions issues.

Are these QIYBONE sensors durable and easy to install?

The sensors use stainless steel housings and heat-resistant internals with reinforced sealing for longer service life in harsh exhaust conditions. They are produced to match OEM connector patterns, allowing most owners or technicians to install them without modifications.

• Stainless steel body and high-temp materials for corrosion resistance.
• OE-style plug-and-play connectors; compare your original plug to the product images.
• Designed for quick installation with basic hand tools in minutes for experienced users.

Which part numbers and cross-references should I check?

The listing includes common OE and reference numbers to simplify parts matching before purchase. Verifying these cross-references against your vehicle’s original sensor number helps ensure correct fitment and avoids returns.

• Upstream reference: 234-5029 and cross-references such as 392102G100, 19060481.
• Downstream reference: 234-4238 and cross-references like 392102C210, 392102G200.
• Also listed alternate OE codes and vendor catalog numbers for double-checking fitment.

Who is this for: This QIYBONE 2-piece oxygen sensor set is intended for owners and mechanics working on compatible Hyundai and KIA 2.0L and 2.4L models who need a direct-fit, cost-effective replacement. It suits drivers troubleshooting O2 sensor-related check-engine codes, performance issues, or elevated fuel usage, plus DIYers who prefer plug-and-play parts that match OEM specifications without extra adapters.