{"product_id":"o2-oxygen-sensor-upstream-downstream-for-toyota-avalon-2005-2006-3-5l","title":"O2 Oxygen Sensor Upstream Downstream for Toyota Avalon (2005-2006) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Kit for 2005-2006 Toyota Avalon (XX30)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete upstream and downstream O2 oxygen sensor kit replaces degraded factory monitoring probes on the 2005-2006 Toyota Avalon to restore closed-loop fuel trim accuracy and eliminate emissions fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota Avalon Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e2GR-FE\u003c\/strong\u003e engine relies on rapid feedback from its factory sensors to balance stoich air-fuel ratios. Over extended mileage, thermal cycling and exhaust carbon contaminate the sensitive internal zirconia elements in the factory \u003cstrong\u003eXX30\u003c\/strong\u003e chassis sensors. This degradation leads to delayed switching responses, false catalytic converter inefficiency codes (P0420\/P0430), rough idle, and unmetered fuel dumping that accelerates catalytic core breakdown.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for exact electrical resistance and fast transient thermal response, this matched 4-piece sensor set restores factory closed-loop engine management. Constructed with dual-layer protective stainless steel shields and high-temperature ceramic sensing cells, these direct-fit sensors resist carbon fouling and thermal shock. Pre-crimped OE-spec harnesses ensure seamless bank-1 and bank-2 data feedback without splicing, maintaining precise stoichiometry and preserving downstream catalytic efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Upstream Oxygen Sensor (OE Equivalent: 234-9050)\u003c\/li\u003e\n  \u003cli\u003e1x Upstream Oxygen Sensor (OE Equivalent: 234-9041)\u003c\/li\u003e\n  \u003cli\u003e1x Downstream Oxygen Sensor (OE Equivalent: 234-4064)\u003c\/li\u003e\n  \u003cli\u003e1x Downstream Oxygen Sensor (OE Equivalent: 234-4260)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100 style=\" border-collapse: collapse border: solid font-size: min-width:\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2005-2006 Toyota Avalon\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e2GR-FE\u003c\/strong\u003e \/ \u003cstrong\u003eXX30\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e268 hp \/ 248 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eS4-4064\u003c\/strong\u003e, \u003cstrong\u003e234-4260\u003c\/strong\u003e, \u003cstrong\u003e234-9041\u003c\/strong\u003e, \u003cstrong\u003e234-9050\u003c\/strong\u003e, \u003cstrong\u003e2344046\u003c\/strong\u003e, \u003cstrong\u003e2344260\u003c\/strong\u003e, \u003cstrong\u003e2349041\u003c\/strong\u003e, \u003cstrong\u003e2349050\u003c\/strong\u003e, \u003cstrong\u003e2344064\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005 Toyota Avalon 3.5L V6 (XL, Touring, XLS, Limited)\u003c\/li\u003e\n  \u003cli\u003e2006 Toyota Avalon 3.5L V6 (XL, Touring, XLS, Limited)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the XX30 Avalon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2005-2006 Toyota Avalon equipped with the \u003cstrong\u003e2GR-FE\u003c\/strong\u003e 3.5L V6 engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire cutting or repinning?\u003c\/h4\u003e\n\u003cp\u003eNo, all four sensors feature OE-specification weather-pack connectors for a plug-and-play installation without wire modification.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintain the smooth, efficient performance your Toyota V6 was built to deliver. Precise oxygen feedback protects your engine's long-term emissions integrity, clears persistent CEL faults, and restores original fuel economy.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551490539768,"sku":"DS-ENMCYDYEJ","price":98.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-toyota-avalon-2005-2006-3-5l-1.jpg?v=1790797274","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-toyota-avalon-2005-2006-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}