{"product_id":"oxygen-sensors-for-toyota-sienna-2001-2003-3-0l-downstream","title":"Oxygen Sensors for Toyota Sienna (2001-2003) 3.0L Downstream","description":"\u003ch2\u003eDirect-Fit Downstream Oxygen Sensor for 2001-2003 Toyota Sienna\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The downstream oxygen sensor monitors catalytic converter efficiency and post-cat exhaust stream lambda on the 2001-2003 Toyota Sienna to resolve check engine lights and ensure closed-loop emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota Sienna Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended heat cycles, the factory downstream oxygen sensors on the \u003cstrong\u003eXL10\u003c\/strong\u003e chassis equipped with the 3.0L \u003cstrong\u003e1MZ-FE\u003c\/strong\u003e V6 succumb to silicone poisoning, carbon accumulation, and internal heater element open-circuits. Located directly in the high-heat exhaust path after the catalytic converter, the aging OEM zirconia thimble loses its switching speed and reporting resolution. This sluggish millivolt response triggers nuisance diagnostic trouble codes such as P0136, P0141, or false-positive P0420 catalyst efficiency faults, preventing the vehicle from passing state OBD-II readiness tests.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit replacement sensor features a dense zirconia ceramic element lined with porous platinum electrodes and housed within a corrosion-resistant 304 stainless steel shell. A dual-layer protective shield prevents particulate contamination and thermal shock from road spray. Factory-crimped, pre-pinned wiring with high-temperature fiberglass\/silicone sleeving delivers plug-and-play connectivity to the factory engine harness without splicing, restoring precise post-cat voltage feedback to the powertrain control module (PCM).\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;\"\u003e\n\u003cstrong\u003e1MZ-FE\u003c\/strong\u003e \/ \u003cstrong\u003eXL10\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;\"\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;\"\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\u003e2001-2003 Toyota Sienna CE 3.0L V6 (1MZ-FE)\u003c\/li\u003e\n  \u003cli\u003e2001-2003 Toyota Sienna LE 3.0L V6 (1MZ-FE)\u003c\/li\u003e\n  \u003cli\u003e2001-2003 Toyota Sienna XLE 3.0L V6 (1MZ-FE)\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 downstream position on the 2001-2003 Toyota Sienna equipped with the \u003cstrong\u003e1MZ-FE\u003c\/strong\u003e 3.0L V6 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this sensor clear a P0141 heater circuit code?\u003c\/strong\u003e\u003cbr\u003e Yes, replacing a burned-out internal heater element with this unit restores factory resistance values and clears heater circuit fault codes once drive cycles complete.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to match the high-mileage dependability expected of the Sienna platform, this downstream sensor delivers accurate signal feedback, weather-tight sealing, and thermal resilience under heavy continuous operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50511729131768,"sku":"DS-EIK3WEGBX","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-2001-2003-3-0l-downstream-1.jpg?v=1789418706","url":"https:\/\/performancechiptuning.com\/fr\/products\/oxygen-sensors-for-toyota-sienna-2001-2003-3-0l-downstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}