{"product_id":"o2-oxygen-sensor-upstream-downstream-for-land-rover-range-rover-2003-2005-4-4l","title":"O2 Oxygen Sensor Upstream Downstream for Land Rover Range Rover (2003-2005) 4.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Replacement Set for 2003-2005 Land Rover Range Rover (L322)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete 4-piece O2 Oxygen Sensor Set replaces degraded factory lambda probes on the 2003-2005 Land Rover Range Rover to re-establish accurate closed-loop air-fuel metering and resolve catalytic diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Land Rover Range Rover Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOperating inside the high-heat exhaust stream of the \u003cstrong\u003eM62TUB44\u003c\/strong\u003e 4.4L V8, factory oxygen sensors suffer from thermal fatigue, carbon contamination, and internal zirconia element wear after years of service. Aged sensors generate sluggish response times and false lean voltage signals. This causes the engine control module to overcompensate with excessive fuel trims, leading to poor fuel economy, engine hesitation, failed emissions inspections, and persistent check engine lights (DTCs \u003cstrong\u003eP0130\u003c\/strong\u003e through \u003cstrong\u003eP0161\u003c\/strong\u003e, \u003cstrong\u003eP0420\u003c\/strong\u003e, and \u003cstrong\u003eP0430\u003c\/strong\u003e).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive set provides both upstream air-fuel regulation sensors and downstream catalyst monitoring sensors engineered to OEM specifications. Featuring high-durability planar ceramic sensing elements and integrated fast-acting heaters, each sensor rapidly reaches optimal operating temperature. Factory-correct harness lengths, high-temp insulated wire sleeves, and OE-keyed pin connectors ensure direct-fit installation into standard M18x1.5 exhaust bungs with zero wire splicing or pin repointing required.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Upstream Oxygen Sensors (Pre-Catalytic Converter)\u003c\/li\u003e\n  \u003cli\u003e2 Downstream Oxygen Sensors (Post-Catalytic Converter)\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: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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;\"\u003e2003-2005 Land Rover Range Rover\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;\"\u003eM62TUB44 4.4L V8 \/ L322\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;\"\u003e282 hp \/ 325 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;\"\u003e0258005109, M0701215X2, 1781433050, 11781433075, 11781433940, 025800347, 234-4672\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\u003e2003 Land Rover Range Rover Base \/ HSE 4.4L V8\u003c\/li\u003e\n  \u003cli\u003e2004 Land Rover Range Rover Base \/ HSE 4.4L V8\u003c\/li\u003e\n  \u003cli\u003e2005 Land Rover Range Rover Base \/ HSE 4.4L V8\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 L322 Range Rover?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2005 Land Rover Range Rover equipped with the \u003cstrong\u003eM62TUB44\u003c\/strong\u003e BMW-sourced 4.4L V8 engine. \u003cstrong\u003eThis kit does not fit 2006 and newer models equipped with Jaguar-derived 4.4L or 4.2L engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eShould anti-seize lubricant be used during installation?\u003c\/h4\u003e\n\u003cp\u003eApply high-temperature anti-seize compound strictly to the bung threads only, taking extreme care not to contaminate the active ceramic sensing tip.\u003c\/p\u003e\n\n\u003ch3\u003eThe Land Rover Precision Standard\u003c\/h3\u003e\n\u003cp\u003ePreserving precise European engine management requires matched lambda resistance across both exhaust banks, preventing converter burnout and ensuring immediate check-engine-light-free operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67910015582456,"sku":"DS-EM5NUJRR6","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-15464666267896-main-clean.jpg?v=1793395757","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-land-rover-range-rover-2003-2005-4-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}