{"product_id":"a-premium-downstream-o2-oxygen-sensor-for-toyota-lexus-4-wire-heated-threaded-direct-fit","title":"A-Premium Downstream O2 Oxygen Sensor for Toyota \u0026 Lexus — 4‑Wire Heated, Threaded Direct Fit","description":"\u003cp\u003e\u003cstrong\u003eThe A-Premium downstream (B1S2) heated oxygen sensor replaces the factory unit to restore accurate exhaust monitoring for compatible Toyota and Lexus models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle is showing an O2 sensor code, reduced fuel economy, or fluctuating emissions readiness, this direct-fit downstream oxygen sensor from A-Premium is built to match original equipment form, fit and function. It’s designed for threaded installation and comes with a four-wire heated connector to integrate with vehicles that require sensor heating and precise lambda feedback downstream of the catalytic converter.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Toyota and Lexus models is this oxygen sensor compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis downstream sensor covers a range of Toyota and Lexus applications across several model years. It fits vehicles with both 1.5L and 1.8L four-cylinder engines as well as select 3.5L V6 models when specified as the downstream\/front location.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLexus CT200h: 2011–2017 L4 1.8L (B1S2 downstream)\u003c\/li\u003e\n  \u003cli\u003eToyota Prius \u0026amp; variants: Prius 2010–2015 L4 1.8L, Prius C 2012–2019 L4 1.5L, Prius V 2012–2017 L4 1.8L, Prius Plug-in 2012–2015 L4 1.8L\u003c\/li\u003e\n  \u003cli\u003eLexus RX350\/RX450h and Toyota Highlander\/Sienna: select 2011–2016 V6 3.5L applications (downstream\/front positions per model notes)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key specifications and electrical details?\u003c\/h3\u003e\n\u003cp\u003eThis sensor uses a 4-wire heated design to speed warm-up and provide stable oxygen readings under a variety of exhaust temperatures. The product ships as a single boxed sensor with a male connector and threaded mounting to match OE replacement steps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWire quantity: 4 (heated sensor)\u003c\/li\u003e\n  \u003cli\u003eOverall cable length: 575 mm\u003c\/li\u003e\n  \u003cli\u003eMounting: threaded oxygen sensor bung\u003c\/li\u003e\n  \u003cli\u003eConnector gender: male; package quantity: 1 sensor per box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I confirm fitment for my vehicle before ordering?\u003c\/h3\u003e\n\u003cp\u003eAlways verify compatibility by entering your exact vehicle year, make, model, engine and position in the listing’s vehicle selector. Cross-reference the supplier reference numbers if you need to match part history or compare with your OEM sensor.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReference numbers listed: 250-24870, 350-34074, 234-4400, 2344400\u003c\/li\u003e\n  \u003cli\u003eUse the vehicle info tool at the top-left of the product page to check fitment\u003c\/li\u003e\n  \u003cli\u003eRead the Special Notes section for model-year or submodel exceptions before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat can I expect during installation and early operation?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows the same steps as replacing a threaded downstream O2 sensor: disconnect the negative battery terminal, unplug the sensor connector, remove the old sensor with an oxygen-sensor socket, and install the new sensor with the correct torque. After installation, engine management systems may take a short drive cycle to clear stored codes and update readiness monitors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires standard oxygen sensor socket and torque wrench\u003c\/li\u003e\n  \u003cli\u003eAllow a short drive cycle for ECM to recalibrate and reset emissions readiness\u003c\/li\u003e\n  \u003cli\u003eInspect connector and harness for corrosion or heat damage during replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Technicians, DIYers and fleet maintenance teams who need a reliable downstream heated O2 sensor for specified Toyota and Lexus models. If you require an OE-style threaded, 4-wire heated sensor with verified vehicle fitment and a one-year unlimited-mileage warranty from A-Premium, this part is intended for your application. Make sure to confirm your vehicle details and check the special fitment notes before purchase to ensure correct selection.\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: Does this sensor fit my 2014 Toyota Prius?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the A-Premium downstream sensor fits 2010–2015 Toyota Prius 1.8L models; verify engine and position before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does the 4-wire design mean?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A 4-wire oxygen sensor includes two heater wires plus two signal\/reference wires for faster warm-up and accurate readings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":67590684442809,"sku":"B07GH2N7MS","price":83.81,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/a-premium-downstream-sensor-front-view_5efb2251-bcd5-4daa-ad5c-4dff78f0b0d6.jpg?v=1790535714","url":"https:\/\/redleafauto.ca\/products\/a-premium-downstream-o2-oxygen-sensor-for-toyota-lexus-4-wire-heated-threaded-direct-fit","provider":"Redleaf Auto","version":"1.0","type":"link"}