{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ford-taurus-2016-2019-3-5l","title":"O2 Oxygen Sensor Upstream Downstream for Ford Taurus (2016-2019) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Sensor Kit for 2016-2019 Ford Taurus (D3)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 4-piece oxygen (O2) sensor kit monitors pre- and post-catalyst exhaust gas on the \u003cstrong\u003e2016-2019 Ford Taurus\u003c\/strong\u003e (\u003cstrong\u003eD3\u003c\/strong\u003e) \u003cstrong\u003e3.5L Duratec\u003c\/strong\u003e and \u003cstrong\u003e3.5L EcoBoost\u003c\/strong\u003e to maintain closed-loop fuel control.\u003c\/p\u003e\u003ch3\u003eThe Stock Ford Taurus O2 Sensor Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eD3\u003c\/strong\u003e Taurus powered by the \u003cstrong\u003e3.5L Duratec\u003c\/strong\u003e or \u003cstrong\u003e3.5L EcoBoost\u003c\/strong\u003e, factory O2 sensors endure extreme exhaust heat and carbon soot. Over time, internal zirconia elements foul or micro-fracture, causing sluggish air-fuel voltage switching. Simultaneously, internal heater circuits degrade from vibration and heat soak. These failures trigger \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0155\u003c\/strong\u003e, and \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes while forcing rich open-loop fueling.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Oxygen Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light (DTCs):\u003c\/strong\u003e Triggers heater circuit codes \u003cstrong\u003eP0135\u003c\/strong\u003e\/\u003cstrong\u003eP0155\u003c\/strong\u003e or catalyst codes \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e from sluggish switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive Fuel Consumption:\u003c\/strong\u003e Biased upstream feedback forces rich open-loop trims and foul exhaust soot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Failed Emissions:\u003c\/strong\u003e Unstable fuel trims cause hesitation and incomplete OBD-II readiness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Matched O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing all four sensors together restores uniform closed-loop response across both banks on your \u003cstrong\u003eD3\u003c\/strong\u003e Taurus. Each sensor features a laser-welded stainless housing and thermal-shock-resistant ceramic element sealed against exhaust moisture. Calibrated to OEM resistance curves, this kit replaces \u003cstrong\u003e234-5175\u003c\/strong\u003e, \u003cstrong\u003e234-5176\u003c\/strong\u003e, and \u003cstrong\u003e234-4966\u003c\/strong\u003e. Pre-terminated OEM-style connectors and exact harness lengths ensure true plug-and-play bung installation.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 Upstream Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003e2 Downstream Oxygen Sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\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;\"\u003e2016-2019 Ford Taurus\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;\"\u003e3.5L Duratec \/ 3.5L EcoBoost \/ D3\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;\"\u003eEmissions \u0026amp; Sensor Architecture\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2x Upstream Air-Fuel \/ 2x Downstream Heated Zirconia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\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;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e234-5175, 234-5176, 234-4966\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2016-2019 Ford Taurus 3.5L Naturally Aspirated (2 Upstream, 2 Downstream)\u003c\/li\u003e\n\u003cli\u003e2016-2019 Ford Taurus 3.5L EcoBoost (2 Upstream, 2 Downstream)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the D3 Taurus?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Fits 2016-2019 Ford Taurus models with the \u003cstrong\u003e3.5L Duratec\u003c\/strong\u003e or \u003cstrong\u003e3.5L EcoBoost\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 2013-2015 Taurus, 2.0L engines, and other Ford\/Lincoln 3.5L\/3.7L models.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135 or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor-induced.\u003c\/strong\u003e Restores heater resistance and cross-count switching to clear \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0155\u003c\/strong\u003e, and false \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes.\u003c\/p\u003e\u003ch4\u003eIs wiring modification or splicing required?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e Includes OEM connectors and factory harness lengths for plug-and-play installation with O2-safe thread anti-seize.\u003c\/p\u003e\u003ch3\u003eThe Ford Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt for the ECU precision of the \u003cstrong\u003eD3\u003c\/strong\u003e platform, this matched sensor kit restores crisp fueling and CEL-free operation on your \u003cstrong\u003e2016-2019 Ford Taurus\u003c\/strong\u003e.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119469457656,"sku":"DS-EU9AOI3DM","price":133.95,"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-taurus-2016-2019-3-5l-1.jpg?v=1794722696","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-ford-taurus-2016-2019-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}