{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ford-mustang-1995-2010-3-8l-4-0l-4-6l-5-0l-5-4l","title":"O2 Oxygen Sensor Upstream Downstream for Ford Mustang (1995-2010) 3.8L, 4.0L, 4.6L, 5.0L, 5.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor 4-Piece Set for 1995-2010 Ford Mustang (SN95 \/ S197)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Oxygen Sensor Set replaces worn factory upstream and downstream sensors on 1995-2010 Mustangs to restore precise closed-loop AFR metering and resolve diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Mustang Sensor Contamination \u0026amp; Delay\u003c\/h3\u003e\n\u003cp\u003eExhaust heat and chemical contamination degrade OEM zirconia thimbles over time on the \u003cstrong\u003eSN95\u003c\/strong\u003e and \u003cstrong\u003eS197\u003c\/strong\u003e platforms. Prolonged exposure to carbon blow-by and thermal cycling causes sensing elements to become sluggish, delaying the voltage transitions between 0.1V (lean) and 0.9V (rich). On Ford \u003cstrong\u003eModular\u003c\/strong\u003e, \u003cstrong\u003eWindsor\u003c\/strong\u003e, \u003cstrong\u003eEssex\u003c\/strong\u003e, and \u003cstrong\u003eCologne\u003c\/strong\u003e powerplants, this delayed response causes inaccurate Long Term Fuel Trims (LTFT), unburnt fuel wash, rough idle, reduced mileage, and catalytic inefficiency faults such as \u003cstrong\u003eP0130-P0161\u003c\/strong\u003e and \u003cstrong\u003eP0420\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-sensor replacement kit restores factory closed-loop engine management. Constructed with dual-layer 304 stainless steel heat shields and porous ceramic zirconia planar elements, each sensor offers rapid response times and resistance to silicone contamination. Integrated rapid-fire internal heaters reach light-off operating temperature within seconds, minimizing cold-start emissions. Factory-keyed pigtail connectors, sealed weather-pack terminals, and precision M18x1.5 threaded bungs ensure direct plug-and-play installation without wire splicing.\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;\"\u003e1995-2010 Ford Mustang\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;\"\u003eWindsor, Essex, Cologne, Modular \/ SN95, S197\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;\"\u003e145-540 hp \/ 215-510 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;\"\u003e234-4046, 234-4001, 234-4070, 234-4071, 234-4127, 234-4401, SG1807, SG1808, SG1813, SG1814, SG726, SG459\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\u003e1995 Ford Mustang GT \/ Cobra 5.0L V8\u003c\/li\u003e\n  \u003cli\u003e1995-2004 Ford Mustang 3.8L V6\u003c\/li\u003e\n  \u003cli\u003e1996-2010 Ford Mustang GT 4.6L V8 (2V \/ 3V)\u003c\/li\u003e\n  \u003cli\u003e1996-2004 Ford Mustang SVT Cobra \/ Mach 1 4.6L 4V\u003c\/li\u003e\n  \u003cli\u003e2005-2010 Ford Mustang 4.0L V6\u003c\/li\u003e\n  \u003cli\u003e2007-2010 Ford Mustang Shelby GT500 5.4L Supercharged 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 SN95 and S197 Mustang?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1995-2010 Ford Mustang equipped with the \u003cstrong\u003e3.8L\u003c\/strong\u003e, \u003cstrong\u003e4.0L\u003c\/strong\u003e, \u003cstrong\u003e4.6L\u003c\/strong\u003e, \u003cstrong\u003e5.0L\u003c\/strong\u003e, and \u003cstrong\u003e5.4L\u003c\/strong\u003e engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to clear PCM trouble codes after replacement?\u003c\/h4\u003e\n\u003cp\u003eYes, clearing DTCs with an OBD-II scan tool resets stored fuel trim tables, allowing the ECU to calibrate immediately to new sensor voltages.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Muscle Caliber\u003c\/h3\u003e\n\u003cp\u003eAccurate exhaust feedback is mandatory for crisp throttle response and broad-band torque across classic 5.0L pushrod and high-revving Modular V8 Mustang builds.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67907881926904,"sku":"DS-EHES6P3E1","price":101.95,"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-mustang-1995-2010-3-8l-4-0l-4-6l-5-0l-5-4l-1.jpg?v=1793381220","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-ford-mustang-1995-2010-3-8l-4-0l-4-6l-5-0l-5-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}