{"product_id":"newyall-oxygen-sensor-kit-for-kia-hyundai-1-6l-l4-upstream-downstream-pair-234-5055-234-4568-oem-fit","title":"NewYall Oxygen Sensor Kit for Kia\/Hyundai 1.6L L4 — Upstream \u0026 Downstream Pair (234-5055\/234-4568) OEM-fit","description":"\u003cp\u003e\u003cstrong\u003eNewYall L4 1.6L upstream and downstream oxygen sensor kit replaces faulty O2 sensors for Kia Rio, Soul and Hyundai Accent, Veloster model years 2012–2015 to restore accurate air-fuel monitoring.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis NewYall OEM-fit oxygen sensor pair is engineered specifically for L4 1.6L engines in selected Kia and Hyundai models. It includes both upstream (pre-catalyst) and downstream (post-catalyst) sensors with the compatible part numbers 234-5055 and 234-4568, so you can replace worn or failing sensors without guessing which unit you need. Each sensor is manufactured and tested to meet fitment and electrical specifications for direct installation where those part numbers apply.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and engines are these sensors designed for?\u003c\/h3\u003e\n\u003cp\u003eThese oxygen sensors are made only for the 1.6L L4 engines listed; they do not fit other displacements or engine types. Confirm your vehicle year and engine code before purchase to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible Kia models: Rio (2012–2014), Soul (2012–2015)\u003c\/li\u003e\n  \u003cli\u003eCompatible Hyundai models: Accent (2012–2014), Veloster (2012–2014)\u003c\/li\u003e\n  \u003cli\u003eEngine: L4 1.6L ONLY — verify under-hood label or VIN engine code\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do upstream and downstream sensors differ and why replace both?\u003c\/h3\u003e\n\u003cp\u003eThe upstream sensor measures exhaust oxygen before the catalytic converter to help the engine control unit tune fuel delivery. The downstream sensor monitors catalytic converter efficiency. Replacing both ensures reliable readings and helps the ECU maintain correct air-fuel ratios.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUpstream (234-5055): primary air-fuel feedback sensor\u003c\/li\u003e\n  \u003cli\u003eDownstream (234-4568): catalyst performance monitor\u003c\/li\u003e\n  \u003cli\u003eReplacing both reduces mismatched readings and diagnostic trouble codes (DTCs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and fitment?\u003c\/h3\u003e\n\u003cp\u003eThese sensors are designed for direct, bolt-in replacement using factory connectors and threads. Basic mechanical skills are sufficient; typical steps include lifting the vehicle, locating each sensor, disconnecting the electrical connector, unscrewing the old sensor, and torquing the new sensor to spec.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit connectors and thread sizes for 1.6L L4 applications\u003c\/li\u003e\n  \u003cli\u003eStandard oxygen sensor socket or 22mm wrench required\u003c\/li\u003e\n  \u003cli\u003eTorque to manufacturer specification and use anti-seize where appropriate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance or maintenance benefits will I see after replacement?\u003c\/h3\u003e\n\u003cp\u003eReplacing failing oxygen sensors improves engine management accuracy and reduces the chance of check-engine lights caused by sensor faults. While not a guarantee of fuel economy changes, fresh sensors provide the ECU the correct data it needs to adjust combustion and emissions control systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores accurate air-fuel measurements for the ECU\u003c\/li\u003e\n  \u003cli\u003eHelps prevent false diagnostic trouble codes related to O2 sensors\u003c\/li\u003e\n  \u003cli\u003eSupports emissions system monitoring and catalytic converter checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This NewYall sensor kit is aimed at DIY mechanics, independent repair shops, and vehicle owners who need OEM-compatible oxygen sensors for Kia Rio, Soul or Hyundai Accent, Veloster with the 1.6L L4 engine from the specified years. It’s not suitable for other engines or model years, so verify your vehicle’s engine size and part numbers before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these sensors compatible with other engine sizes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These NewYall sensors are designed exclusively for L4 1.6L engines in the listed Kia and Hyundai models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do the sensors come with connectors and are they plug-and-play?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes upstream and downstream sensors with factory-style connectors for direct plug-and-play installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NewYall","offers":[{"title":"Default Title","offer_id":48083007045790,"sku":"B0BW8QQ5CQ","price":51.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/newyall-front-packaging-sensors.jpg?v=1785822348","url":"https:\/\/northtrailauto.ca\/products\/newyall-oxygen-sensor-kit-for-kia-hyundai-1-6l-l4-upstream-downstream-pair-234-5055-234-4568-oem-fit","provider":"North Trail Auto","version":"1.0","type":"link"}