{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-impala-malibu-2013-2019-2-5l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Impala Malibu (2013-2019) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream O2 Sensor Kit for 2013-2019 Chevrolet Impala,Malibu (GMX351 \/ GMX353)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This matched upstream and downstream oxygen sensor kit monitors exhaust air-fuel ratios and catalyst efficiency on 2013-2019 Chevrolet Impala and Malibu \u003cstrong\u003eLKW 2.5L I4\u003c\/strong\u003e models on the \u003cstrong\u003eEpsilon II (GMX351 \/ GMX353)\u003c\/strong\u003e chassis.\u003c\/p\u003e\u003ch3\u003eThe Stock Chevrolet Impala,Malibu Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eEpsilon II (GMX351 \/ GMX353)\u003c\/strong\u003e platform with the \u003cstrong\u003eLKW 2.5L I4\u003c\/strong\u003e engine endure relentless thermal cycling and carbon soot exposure. Over time, internal heater elements burn out, silicone or oil residue contaminates the zirconia sensing cell, and exhaust heat embrittles wiring insulation. When sensor response slows or flatlines, the ECM loses closed-loop fuel control, triggering codes like \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, or \u003cstrong\u003eP0420\u003c\/strong\u003e.\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 Heater circuit or slow-response faults including \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0133\u003c\/strong\u003e, and \u003cstrong\u003eP0141\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eErratic Fuel Trims:\u003c\/strong\u003e Sluggish millivolt feedback forces rich open-loop operation, causing rough idle and exhaust soot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissions Failure:\u003c\/strong\u003e Elevated tailpipe hydrocarbons, reduced fuel economy, and incomplete OBD-II readiness monitors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Matched O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both sensors together restores synchronized pre-catalyst fuel trim feedback and post-catalyst monitoring on the \u003cstrong\u003eLKW 2.5L I4\u003c\/strong\u003e. Each direct-fit sensor uses a fast-light-off zirconia planar element, stainless steel body, and factory-indexed connectors replacing OEM numbers \u003cstrong\u003e12643707\u003c\/strong\u003e, \u003cstrong\u003eRE1687-247\u003c\/strong\u003e, and \u003cstrong\u003e234-4762\u003c\/strong\u003e. Pre-applied thread anti-seize and OEM harness lengths provide splice-free installation and accurate millivolt output to the ECM.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 Upstream Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003e1 Downstream Oxygen Sensor\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;\"\u003e2013-2019 Chevrolet Impala,Malibu\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;\"\u003eLKW 2.5L I4 \/ Epsilon II (GMX351 \/ GMX353)\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; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit Zirconia Ceramic Planar Element\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;\"\u003e12643707, RE1687-247, 234-4762\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChevrolet Impala (2014-2019) — 2.5L\u003c\/li\u003e\n\u003cli\u003eChevrolet Malibu (2013-2015) — 2.5L\u003c\/li\u003e\n\u003cli\u003eChevrolet Malibu Limited (2016) — 2.5L\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the GMX351 \/ GMX353 Impala,Malibu?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This fits the 2013-2019 Chevrolet Impala,Malibu equipped with the \u003cstrong\u003eLKW 2.5L I4\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 2.0L, 2.4L, and 3.6L engines; confirm engine size before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135\/P0141 codes and restore fuel economy?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e New sensors eliminate heater circuit faults like \u003cstrong\u003eP0135\u003c\/strong\u003e and \u003cstrong\u003eP0141\u003c\/strong\u003e, restoring closed-loop fuel trims once cleared with a scan tool.\u003c\/p\u003e\u003ch4\u003eIs wire splicing required for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e Both sensors include factory plug-and-play connectors for direct installation into the stock exhaust bungs.\u003c\/p\u003e\u003ch3\u003eThe Chevrolet Precision Standard\u003c\/h3\u003e\u003cp\u003ePrecise O2 feedback keeps the \u003cstrong\u003eLKW 2.5L I4\u003c\/strong\u003e running efficiently with consistent OBD-II readiness and OEM plug-and-play reliability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68114535940344,"sku":"DS-EOOEHO16W","price":46.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-impala-malibu-2013-2019-2-5l-1.jpg?v=1794698422","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-impala-malibu-2013-2019-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}