{"product_id":"o2-oxygen-sensor-downstream-for-lincoln-mks-mkt-mkz-2013-2015-3-7l","title":"O2 Oxygen Sensor Downstream for Lincoln MKS MKT MKZ (2013-2015) 3.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Downstream Oxygen Sensor Pair for 2013-2015 Lincoln MKS, MKT, MKZ (D3, D4, CD4)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Downstream Oxygen Sensor Set monitors catalytic converter efficiency on the 2013-2015 Lincoln MKS, MKT, and MKZ to eliminate check engine lights, verify emissions compliance, and preserve optimal air-fuel trimming.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Lincoln MKS,MKT,MKZ Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory post-catalytic oxygen sensors on the \u003cstrong\u003e3.7L Duratec 37 (Cyclone)\u003c\/strong\u003e V6 undergo severe thermal cycling inside the tightly packed exhaust tunnel. Over time, soot contamination, unburnt hydrocarbons, and internal ceramic element aging slow down sensor response times. This degradation typically triggers persistent catalytic efficiency DTCs such as P0420 and P0430, forcing erratic long-term fuel trim modifications, elevated tailpipe emissions, and failed state inspection cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to resolve diagnostic DTCs, this direct-fit downstream pair features planar zirconia sensing elements with fast-acting integrated heaters that achieve operating temperature rapidly. Built with 304 stainless steel threaded shells, dual-layered external protective sleeves, and high-temp cross-linked harness wiring, these sensors resist thermal shock and road debris. Factory-matched pin terminals snap cleanly into OEM engine harnesses without requiring wire splicing, matching OEM standards including \u003cstrong\u003eBE5Z-9G444-A\u003c\/strong\u003e, \u003cstrong\u003e234-4490\u003c\/strong\u003e, and \u003cstrong\u003eBH6Z-9G444-A\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors\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;\"\u003e2013-2015 Lincoln MKS, MKT, MKZ\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;\"\u003e3.7L Duratec 37 \/ D3 (MKS), D4 (MKT), CD4 (MKZ)\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;\"\u003e300-305 hp \/ 277-280 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;\"\u003eBE5Z-9G444-A, BE5Z-9G444-B, BE5Z-9G444-C, 234-4490, BA5Z-9G444-A, BA5Z9G444A, BH6Z-9G444-A, BH6Z9G444A, BR3Z-9G444-A, BR3Z9G444A, 2344490\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\u003e2013-2015 Lincoln MKS 3.7L V6 (Downstream)\u003c\/li\u003e\n  \u003cli\u003e2013-2015 Lincoln MKT 3.7L V6 (Downstream)\u003c\/li\u003e\n  \u003cli\u003e2013-2015 Lincoln MKZ 3.7L V6 (Downstream)\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 D3, D4, and CD4 MKS, MKT, MKZ?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2013-2015 Lincoln MKS, MKT, and MKZ equipped with the \u003cstrong\u003e3.7L Duratec 37\u003c\/strong\u003e engine; confirm your engine displacement prior to ordering as 2.0L EcoBoost and 3.5L EcoBoost variants require different harness configurations.\u003c\/p\u003e\n\n\u003ch4\u003eAre these sensors pre-threaded with anti-seize compound?\u003c\/h4\u003e\n\u003cp\u003eYes, direct-fit replacement oxygen sensors include factory-applied high-temperature anti-seize on the stainless steel threads to prevent galling during installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Lincoln Caliber\u003c\/h3\u003e\n\u003cp\u003eRestoring downstream sensor operation ensures accurate catalyst monitoring, clean diagnostics, and factory-level fuel control on Lincoln's modern luxury platforms.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551451087096,"sku":"DS-EL3TLH6E7","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-downstream-for-lincoln-mks-mkt-mkz-2013-2015-3-7l-1.jpg?v=1790796518","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-downstream-for-lincoln-mks-mkt-mkz-2013-2015-3-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}