{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ford-explorer-1996-2010-4-0l-4-6l-5-0l","title":"O2 Oxygen Sensor Upstream Downstream for Ford Explorer (1996-2010) 4.0L, 4.6L, 5.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream Oxygen Sensor Kit for 1996-2010 Ford Explorer (UN105 \/ U152 \/ U251)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece oxygen sensor set monitors exhaust gas composition and catalytic converter efficiency on the 1996-2010 Ford Explorer to maintain closed-loop air-fuel ratios, restore fuel economy, and eliminate diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Explorer Sensor Degradation Problem\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eFord Explorer\u003c\/strong\u003e degrade significantly over high-heat thermal duty cycles, suffering from silica contamination, lead poisoning, and zirconia core aging. On high-mileage \u003cstrong\u003e4.0L Cologne\u003c\/strong\u003e, \u003cstrong\u003e4.6L Modular\u003c\/strong\u003e, and \u003cstrong\u003e5.0L Windsor\u003c\/strong\u003e powertrains, worn sensors develop slow switching response rates and signal drift. This sensor latency distorts short-term and long-term fuel trims (STFT\/LTFT), leading to rich or lean misfires, rough idle, poor fuel mileage, and recurring diagnostic trouble codes including \u003cstrong\u003eP0130\u003c\/strong\u003e through \u003cstrong\u003eP0161\u003c\/strong\u003e, as well as false catalyst efficiency codes like \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 4-sensor package restores factory ECU closed-loop precision using dual planar zirconia ceramic elements and robust integrated heaters for rapid cold-start activation. Each sensor is engineered with a corrosion-resistant 304 stainless steel body, high-temperature cross-linked wiring, and OEM-spec weather-sealed terminal pins designed to plug directly into the factory wiring loom without splicing. Replacing upstream and downstream banks simultaneously stabilizes air-fuel metering across both cylinder banks, protecting expensive catalytic converters and preventing redundant exhaust service labor on \u003cstrong\u003e234-4001\u003c\/strong\u003e and \u003cstrong\u003eSG1813\u003c\/strong\u003e setups.\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;\"\u003e1996-2010 Ford Explorer\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;\"\u003e4.0L Cologne, 4.6L Modular, 5.0L Windsor \/ UN105, U152, U251\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;\"\u003e160-292 hp \/ 225-315 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\u003e1996-2010 Ford Explorer 4.0L V6 (OHV \/ SOHC)\u003c\/li\u003e\n  \u003cli\u003e2002-2010 Ford Explorer 4.6L V8 (2V \/ 3V Modular)\u003c\/li\u003e\n  \u003cli\u003e1996-2001 Ford Explorer 5.0L V8 (Windsor)\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 UN105, U152, and U251 Explorer?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-2010 Ford Explorer equipped with the \u003cstrong\u003e4.0L Cologne\u003c\/strong\u003e, \u003cstrong\u003e4.6L Modular\u003c\/strong\u003e, or \u003cstrong\u003e5.0L Windsor\u003c\/strong\u003e engines; always verify connector indexing and harness lead length against your original equipment before installation.\u003c\/p\u003e\n\n\u003ch4\u003eShould anti-seize be applied during installation?\u003c\/h4\u003e\n\u003cp\u003eApply a light coat of high-temperature anti-seize strictly to the exhaust threads only, keeping the porous sensing element completely free of chemical contaminants.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford SUV Truck Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining responsive closed-loop exhaust monitoring is vital to preserve towing power, clean tailpipe emissions, and drivetrain longevity across hard-working Ford Explorer platforms under continuous load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67907861414136,"sku":"DS-EIIQZ3S0L","price":99.95,"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-explorer-1996-2010-4-0l-4-6l-5-0l-1.jpg?v=1793380996","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-ford-explorer-1996-2010-4-0l-4-6l-5-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}