{"product_id":"oxygen-sensors-for-toyota-sienna-2004-2010-3-3l-3-5l-downstream","title":"Oxygen Sensors for Toyota Sienna (2004-2010) 3.3L, 3.5L Downstream","description":"\u003ch2\u003eDirect-Fit Downstream Oxygen Sensor for 2004-2010 Toyota Sienna\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Downstream Oxygen Sensor monitors post-catalytic converter exhaust gas composition on the 2004-2010 Toyota Sienna to accurately track catalyst efficiency and maintain closed-loop fuel management.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota Sienna Downstream Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eHigh-mileage factory sensors on the \u003cstrong\u003eXL20\u003c\/strong\u003e chassis inevitably succumb to thermal cycling, vibration fatigue, and internal silica contamination. Over continuous operation, soot and oil blow-by glaze the porous zirconium dioxide sensing element, dampening voltage switching speeds. This degradation causes the engine control module (ECM) to lose accurate downstream feedback, frequently tripping diagnostic trouble codes such as P0136, P0138, or catalyst efficiency code P0420. Left unaddressed, a compromised sensor skews secondary fuel trims and leads to immediate emissions test failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact factory electrical characteristics, this replacement sensor utilizes a robust planar zirconia ceramic element encased in a 304 stainless steel housing. A precision dual-layer diffusion shield protects the internal ceramic substrate against thermal shock and carbon fouling without restricting gas flow to the platinum electrodes. Equipped with an integrated fast-acting internal ceramic heater circuit, the unit rapidly reaches its 600°F operating threshold during cold starts. The factory-terminated harness includes high-temperature fluoropolymer-insulated wiring and an OEM-keyed weatherproof connector, allowing direct plug-and-play installation without wire splicing or pin repinning.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2004-2010 Toyota Sienna\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;\"\u003e3.3L \u003cstrong\u003e3MZ-FE\u003c\/strong\u003e, 3.5L \u003cstrong\u003e2GR-FE\u003c\/strong\u003e \/ \u003cstrong\u003eXL20\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;\"\u003e215–266 hp \/ 222–245 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004-2006 Toyota Sienna CE, LE, XLE, XLE Limited (3.3L V6 \u003cstrong\u003e3MZ-FE\u003c\/strong\u003e, Downstream)\u003c\/li\u003e\n  \u003cli\u003e2007-2010 Toyota Sienna CE, LE, XLE, Limited (3.5L V6 \u003cstrong\u003e2GR-FE\u003c\/strong\u003e, Downstream)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the XL20 Sienna?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2004-2010 Toyota Sienna equipped with the \u003cstrong\u003e3MZ-FE\u003c\/strong\u003e or \u003cstrong\u003e2GR-FE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill replacing this sensor extinguish a P0136 or P0141 check engine light?\u003c\/strong\u003e\u003cbr\u003e Yes, clearing stored DTCs with an OBD-II scanner after installing this downstream sensor will permanently resolve downstream circuit and heater codes once the drive cycle sets.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Durability Standard\u003c\/h3\u003e\n\u003cp\u003eMinivans engineered on Toyota's commercial-grade platforms are built for hundreds of thousands of demanding family and cargo-hauling miles. Maintaining factory-calibrated downstream sensor response preserves combustion efficiency, prevents unnecessary catalytic converter replacement, and ensures your exhaust system runs clean and fully compliant under load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50511720513784,"sku":"DS-EYMD6GNVF","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/oxygen-sensors-for-toyota-sienna-2004-2010-3-3l-3-5l-downstream-1.jpg?v=1789418442","url":"https:\/\/performancechiptuning.com\/fr\/products\/oxygen-sensors-for-toyota-sienna-2004-2010-3-3l-3-5l-downstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}