O2 Oxygen Sensor Up Downstream for Hyundai Kia Rio Soul Spectra (2000-2013)

Restoring Stoichiometry: High-Precision O2 Sensor for Hyundai & Kia Beta II, Alpha II, and Delta V6 Engines

Who It’s For: Engineered for Hyundai and Kia owners running the 1.6L Alpha II, 2.0L Beta II, or 2.7L Delta V6 powerplants who are experiencing erratic idling, failed emissions tests, or a noticeable dip in fuel economy.

The Symptom: Over time, the factory oxygen sensors on the [G4GC / G6BA / G4ED] platforms become “lazy” due to carbon fouling and constant thermal cycling. When these sensors fail to provide real-time data, your ECU defaults to an open-loop fueling map, which often results in a rich-running condition, sluggish throttle response during merging, and that frustrating Check Engine Light (CEL) on your dash. You might feel the car “stumble” when trying to maintain a steady cruising speed as the computer struggles to calculate the correct air-to-fuel ratio.

The Engineering Fix: This replacement sensor utilizes a premium zirconia ceramic element to detect the oxygen differential between the exhaust gas and the ambient air. By generating a precise millivolt signal, it allows your engine control module to trim fuel delivery with surgical precision. This 4-wire configuration ensures a faster light-off time, meaning your engine reaches its optimal operating efficiency sooner after a cold start, reducing internal carbon buildup and protecting your expensive catalytic converter from unburnt fuel saturation.

Why Mechanics Choose This Kit

• Fuel Trim Accuracy: Restores the factory-intended Air/Fuel ratio to maximize miles-per-gallon on the G4GC and G6BA engine platforms.
• Direct-Fit Harness: Features the correct OEM-style connector and a 430mm wire length, eliminating the need for dangerous wire splicing that can lead to signal resistance.
• Thermal Durability: Constructed to withstand the high-heat environment of both upstream (manifold) and downstream (post-cat) locations without signal degradation.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• Hyundai Accent 1.6L L4 2001-2011
• Hyundai Elantra 2.0L L6 2000-2013
• Hyundai Tiburon 2.0L L4/ 2.6L V6 2003-2008
• Hyundai Tucson 2.0L L4 / 2.7 V6 2005-2009
• KIA Spectra 1.8L L4/ 2.0L L4 2004-2009
• KIA Sportage 2.0L L4 / 2.7L V6 2004-2010
• KIA Rio 1.6L L4 2006-2011
• KIA Soul 2.0L L4 2011

Interchange Part Numbers:

234-4851, 3921023710, 3921023750, SG1695

The Performance Promise

Buy with confidence. This sensor is built to the same strict quality control standards as your vehicle’s original equipment. Backed by real automotive experts and fast shipping to get your daily driver back on the road with peak efficiency.