{"product_id":"oxygen-sensors-for-toyota-sienna-2001-2003-3-0l-upstream","title":"Oxygen Sensors for Toyota Sienna (2001-2003) 3.0L Upstream","description":"\u003ch2\u003eDirect-Fit Upstream Oxygen Sensor for 2001-2003 Toyota Sienna\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Upstream Oxygen Sensor for the 2001-2003 Toyota Sienna monitors exhaust gas air-fuel ratios ahead of the catalytic converter to provide precise closed-loop feedback to the ECU, restoring fuel economy and idle stability.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota Sienna Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory air-fuel ratio and O2 sensors on the \u003cstrong\u003eXL10\u003c\/strong\u003e chassis deteriorate after extended exposure to thermal cycling, soot, and unburnt hydrocarbons. On the \u003cstrong\u003e1MZ-FE\u003c\/strong\u003e V6, aging zirconia elements experience silicone and phosphorus poisoning, slowing reaction times. This latency impedes fuel trim corrections, causing rich or lean misfires, rough idle, poor cold-start drivability, decreased fuel mileage, and diagnostic trouble codes such as P0171 or P0135.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to match factory calibration curves, this direct-fit replacement sensor utilizes a high-grade ceramic thimble element with a dual-layer platinum and porous alumina protective coating. The laser-welded 304 stainless steel exterior body resists road salt corrosion and severe exhaust thermal stress. Equipped with pre-crimped factory-style harnesses, OE-pinned waterproof connectors, and high-temperature PTFE lead insulation, this sensor eliminates the need for wire splicing while providing instant, noise-free voltage feedback to the powertrain control module.\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;\"\u003e2001-2003 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;\"\u003e1MZ-FE \/ XL10\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;\"\u003e210 hp \/ 220 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;\"\u003e89467-08010, 89467-08020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001 Toyota Sienna CE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2001 Toyota Sienna LE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2001 Toyota Sienna XLE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2002 Toyota Sienna CE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2002 Toyota Sienna LE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2002 Toyota Sienna XLE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2003 Toyota Sienna CE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2003 Toyota Sienna LE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n  \u003cli\u003e2003 Toyota Sienna XLE 3.0L V6 (1MZ-FE) Upstream\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the XL10 Sienna?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2001-2003 Toyota Sienna equipped with the 1MZ-FE engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve an active check engine light for air-fuel balance?\u003c\/strong\u003e\u003cbr\u003e Yes, replacing a degraded sensor clears upstream closed-loop fault codes and restores OEM stoichiometric fuel trimming once codes are reset.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to endure the daily demands placed on high-mileage family haulers, this sensor delivers rugged reliability and stable emissions control, keeping your 3.0L V6 running cleanly and efficiently mile after mile.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50511222309112,"sku":"DS-ELYV1AJJG","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/oxygen-sensors-for-toyota-sienna-2001-2003-3-0l-upstream-1.jpg?v=1789411523","url":"https:\/\/performancechiptuning.com\/products\/oxygen-sensors-for-toyota-sienna-2001-2003-3-0l-upstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}