{"product_id":"tautoy-o2-oxygen-sensor-2-pack-for-1-4l-buick-chevy-upstream-downstream-stainless-steel","title":"TAUTOY O2 Oxygen Sensor 2-Pack for 1.4L Buick\/Chevy — Upstream \u0026 Downstream, Stainless Steel","description":"\u003cp\u003e\u003cstrong\u003eTAUTOY O2 Oxygen Sensor 2-pack replaces upstream and downstream sensors for 1.4L Buick Encore and multiple Chevy models to restore accurate air-fuel sensing and emissions monitoring.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese two TAUTOY oxygen sensors—one upstream and one downstream—are engineered as direct-fit replacements for a range of 1.4L Buick and Chevrolet vehicles. Built with a double laser-welded stainless steel housing and advanced sensing technology, they measure oxygen partial pressure to help the engine control module maintain the intended air-fuel ratio. Each set includes both required sensors and arrives backed by a one-year warranty for peace of mind.\u003c\/p\u003e\n\n\u003ch3\u003eWill these sensors fit my car model?\u003c\/h3\u003e\n\u003cp\u003eThey are made to match factory fit and function for many 1.4L GM vehicles produced across several model years. Confirm compatibility by matching OEM part numbers or checking the vehicle fit list.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models: 2013–2021 Buick Encore 1.4L\u003c\/li\u003e\n  \u003cli\u003eChevrolet coverage: 2011–2015 Cruze 1.4L (Eco\/LT\/LTZ), 2016 Cruze Limited 1.4L, 2012–2020 Sonic 1.4L, 2013–2021 Trax 1.4L\u003c\/li\u003e\n  \u003cli\u003eOEM references included: 234-4529, 234-4528, 2344529, 2344528, 55569903, 55572993, 55572216, 55574136\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these two sensors differ and why do you get both?\u003c\/h3\u003e\n\u003cp\u003eThe upstream (pre-catalyst) sensor provides rapid oxygen readings that the engine computer uses for real-time fuel trimming. The downstream (post-catalyst) sensor monitors converter efficiency and emissions performance. Selling them as a matched pair ensures synchronized sensing behavior and simplifies a repair that often requires replacing both units.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUpstream sensor: fast-response for air-fuel adjustments\u003c\/li\u003e\n  \u003cli\u003eDownstream sensor: verifies catalytic converter operation\u003c\/li\u003e\n  \u003cli\u003ePairing reduces diagnostic mismatch and future check-engine triggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction improve reliability?\u003c\/h3\u003e\n\u003cp\u003eTAUTOY sensors use a stainless steel body with double laser welding for corrosion resistance and a secure seal around the sensing element. Advanced internal components measure oxygen partial pressure precisely, which helps the ECU maintain optimal fuel delivery and engine drivability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble laser-welded stainless steel housing for durability\u003c\/li\u003e\n  \u003cli\u003eHigh-precision sensing element for accurate oxygen measurement\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet OEM electrical connectors and mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat about warranty and installation guidance?\u003c\/h3\u003e\n\u003cp\u003eEach two-piece set is backed by a one-year limited warranty covering defects in materials and workmanship. Installation is straightforward for a trained technician; always verify connector type and torque specifications, and clear codes after replacement to confirm proper operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1-year limited warranty included with purchase\u003c\/li\u003e\n  \u003cli\u003eOEM part numbers supplied to confirm fitment before install\u003c\/li\u003e\n  \u003cli\u003eRecommended: professional installation and post-replacement code reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The TAUTOY O2 Oxygen Sensor 2-pack is aimed at DIYers, independent mechanics, and fleet technicians who need a reliable, direct-fit upstream and downstream sensor solution for 1.4L Buick Encore and compatible Chevy models. It’s intended for anyone replacing failed sensors, resolving emissions-related check-engine lights, or restoring proper air-fuel feedback after exhaust or catalytic work.\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: Do these TAUTOY sensors match OEM part numbers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They reference OEM numbers like 234-4529 and 234-4528 for direct-fit confirmation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is installation something I can do myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Experienced DIYers can replace them, but manufacturer recommends a professional for correct torque and post-install code reset.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TAUTOY","offers":[{"title":"Default Title","offer_id":55167245844823,"sku":"B0F8Q3FWG3","price":44.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/tautoy-o2-front-packaging.jpg?v=1790379995","url":"https:\/\/britishgarage.co.uk\/products\/tautoy-o2-oxygen-sensor-2-pack-for-1-4l-buick-chevy-upstream-downstream-stainless-steel","provider":"British Garage","version":"1.0","type":"link"}