{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ford-thunderbird-1994-2005-3-8l-3-9l-4-6l","title":"O2 Oxygen Sensor Upstream Downstream for Ford Thunderbird (1994-2005) 3.8L, 3.9L, 4.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Set for 1994-2005 Ford Thunderbird (MN12 \/ DEW98)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Oxygen Sensor Set replaces worn exhaust probes on the 1994-2005 Ford Thunderbird to restore precise closed-loop air-fuel metering and eliminate catalyst efficiency diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Thunderbird Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory zirconia elements across both the \u003cstrong\u003eMN12\u003c\/strong\u003e and \u003cstrong\u003eDEW98\u003c\/strong\u003e generations suffer latency degradation caused by extended thermal cycling, carbon buildup, and exhaust oil blow-by. As internal heater circuits fail and response times lag, the PCM receives delayed voltage feedback, forcing erratic fuel trims. This unmetered drift manifests as rough idling, throttle hesitation, unburned hydrocarbon emissions, and diagnostic codes including \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\u003eEngineered to direct OE specifications, this four-sensor set features high-temperature stainless steel bodies and rapid-response ceramic sensing cores that withstand thermal shock up to 1,472°F. Precision-wound internal heater circuits bring the sensors to closed-loop operating temperatures in seconds. Each unit integrates direct-fit weatherproof harnesses and factory-pinned terminals—requiring zero wire splicing—to restore instantaneous millivolt signal fidelity to the powertrain control module across the \u003cstrong\u003eEssex V6\u003c\/strong\u003e, \u003cstrong\u003eModular V8\u003c\/strong\u003e, and \u003cstrong\u003eAJ-V8\u003c\/strong\u003e engines.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors (Pre-Catalytic Converter)\u003c\/li\u003e\n  \u003cli\u003e2x 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;\"\u003e1994-2005 Ford Thunderbird\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;\"\u003e3.8L Essex, 4.6L Modular, 3.9L AJ30\/AJ35 \/ MN12, DEW98\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;\"\u003e140-280 hp \/ 215-330 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;\"\u003eSG1813, 234-4001, 234-4046, 234-4070, 234-4071, 234-4127, 234-4401, 22013, 22016, 22060, 22071, 22500\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\u003e1994-1997 Ford Thunderbird 3.8L V6 (MN12 Chassis)\u003c\/li\u003e\n  \u003cli\u003e1994-1997 Ford Thunderbird 4.6L V8 (MN12 Chassis)\u003c\/li\u003e\n  \u003cli\u003e2002-2005 Ford Thunderbird 3.9L V8 (DEW98 Chassis)\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 MN12 and DEW98 Thunderbird?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1994-2005 Ford Thunderbird equipped with the \u003cstrong\u003e3.8L Essex\u003c\/strong\u003e, \u003cstrong\u003e4.6L Modular\u003c\/strong\u003e, and \u003cstrong\u003e3.9L AJ-V8\u003c\/strong\u003e engines; verify your exact harness connector styles prior to installation.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need special tools or anti-seize for installation?\u003c\/h4\u003e\n\u003cp\u003eAn oxygen sensor socket is recommended for clearance, and anti-seize must be applied strictly to the threads while keeping the protective sensor probe completely clean.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Touring Standard\u003c\/h3\u003e\n\u003cp\u003eRestoring balanced closed-loop telemetry maintains optimal combustion efficiency, crisp linear acceleration, and compliant tailpipe emissions expected of Ford's flagship rear-wheel-drive platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67910355812600,"sku":"DS-EB78ITFAY","price":102.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-ford-thunderbird-1994-2005-3-8l-3-9l-4-6l-1.jpg?v=1793392773","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-ford-thunderbird-1994-2005-3-8l-3-9l-4-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}