{"product_id":"qiybone-oxygen-o2-sensor-pair-for-toyota-2-5l-l4-upstream-downstream-replacement-2011-2018-oem-fit-stainless","title":"QIYBONE Oxygen O2 Sensor Pair for Toyota 2.5L L4 — Upstream \u0026 Downstream Replacement (2011–2018) OEM Fit, Stainless","description":"\u003cp\u003e\u003cstrong\u003eQIYBONE oxygen sensors (upstream 250-54084 and downstream 250-24360) are a plug-and-play replacement pair engineered to restore accurate air-fuel readings on compatible Toyota, Lexus and Scion 2.5L L4 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese two sensors are built to meet OEM fit and function for select Toyota Camry, Avalon, RAV4, Scion tC and Lexus ES300h model years. Constructed from high-temperature stainless materials with reinforced sealing, the set provides a long-lasting electrical and physical connection so the engine control unit receives stable oxygen feedback for combustion management.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and years will these oxygen sensors fit?\u003c\/h3\u003e\n\u003cp\u003eThese sensors are intended for 2.5L inline‑4 gasoline engines across specified model years. Verify OEM part numbers and connector shape against your factory sensor before ordering to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eToyota Camry: 2012–2017 (2.5L L4)\u003c\/li\u003e\n  \u003cli\u003eToyota Avalon: 2013–2018 (2.5L L4)\u003c\/li\u003e\n  \u003cli\u003eToyota RAV4: 2013–2018 (2.5L L4) — excluding hybrid versions\u003c\/li\u003e\n  \u003cli\u003eScion tC: 2011–2016 (2.5L L4) and Lexus ES300h: 2013–2018 (2.5L L4)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these upstream and downstream sensors improve engine operation?\u003c\/h3\u003e\n\u003cp\u003eUpstream (pre-catalyst) and downstream (post-catalyst) sensors provide separate but complementary feedback to the vehicle ECU. The upstream sensor monitors immediate combustion mixture for fuel trim adjustments, while the downstream sensor tracks catalytic converter efficiency.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFaster, more accurate oxygen readings help the ECU optimize air–fuel ratio\u003c\/li\u003e\n  \u003cli\u003eReduced risk of running rich or lean, improving fuel economy\u003c\/li\u003e\n  \u003cli\u003eDownstream monitoring helps detect catalyst issues and emissions performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the construction and durability features of these QIYBONE sensors?\u003c\/h3\u003e\n\u003cp\u003eQIYBONE designs these sensors with stainless steel housings and heat‑resistant internals to withstand under‑hood temperatures and road exposure. Improved sealing and shielding reduce the chance of moisture or contamination affecting signal reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStainless steel body for corrosion resistance and strength\u003c\/li\u003e\n  \u003cli\u003eHigh‑temperature materials inside for long service life\u003c\/li\u003e\n  \u003cli\u003eDouble protection sealing to minimize exposure to contaminants\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I check before replacing mine?\u003c\/h3\u003e\n\u003cp\u003eThe sensors are made to OEM dimensions and use the factory‑style connector for a straightforward swap. Most installations take minutes if you have basic tools, though rusted fittings or difficult access points can add time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompare connector shape and wire pinout to original sensor before purchase\u003c\/li\u003e\n  \u003cli\u003eSensor threads match OEM sizes for direct replacement (no modification)\u003c\/li\u003e\n  \u003cli\u003eUse anti‑seize on threads if needed and tighten to manufacturer torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Mechanics, DIY enthusiasts and fleet owners who need reliable replacement oxygen sensors for the listed Toyota, Lexus and Scion 2.5L models. Choose this QIYBONE upstream and downstream set if you want an OEM‑style, corrosion‑resistant pair that reinstates proper oxygen sensing and emissions feedback without custom wiring or adapters. Always confirm the part numbers and connector compatibility with your vehicle’s original sensors before installation to ensure a correct match.\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 sensors fit hybrid Toyota RAV4 models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — this set is for non-hybrid 2.5L L4 RAV4s only. Confirm your vehicle’s engine type before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the sensors pre-wired for plug-and-play installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — they use factory-style connectors designed for direct replacement without splicing.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"QIYBONE","offers":[{"title":"Default Title","offer_id":55171366846807,"sku":"B0GGJ1SBRY","price":68.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/qiybone-front-packaging-oxygen-sensors_7e7354ba-461c-4fd0-b3cf-88bfe854cde5.jpg?v=1790443952","url":"https:\/\/britishgarage.co.uk\/products\/qiybone-oxygen-o2-sensor-pair-for-toyota-2-5l-l4-upstream-downstream-replacement-2011-2018-oem-fit-stainless","provider":"British Garage","version":"1.0","type":"link"}