{"product_id":"catalytic-converter-for-acura-mdx-2003-2006-3-5l-rear","title":"Catalytic Converter for Acura MDX (2003-2006) 3.5L Rear","description":"\u003ch2\u003eDirect-Fit Rear Catalytic Converter for 2003-2006 Acura MDX\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit rear catalytic converter replaces the clogged or degraded downstream emissions unit on the 2003-2006 MDX to eliminate P0420 DTCs, normalize exhaust backpressure, and restore engine efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Acura MDX Catalytic Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended operating cycles, the factory underfloor secondary catalytic converter on the \u003cstrong\u003eYD1\u003c\/strong\u003e chassis experiences washcoat sintering and thermal breakdown. With age and sustained thermal cycling from the \u003cstrong\u003eJ35A5\u003c\/strong\u003e 3.5L V6, the stock ceramic brick degrades, resulting in reduced hydrocarbon and NOx reduction efficiency, exhaust flow restriction, elevated exhaust gas temperatures (EGT), and persistent diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed from corrosion-resistant 409 stainless steel, this complete replacement unit features CNC-machined direct-fit flanges designed for leak-free, bolt-on mating without cutting or custom fabrication. Internally, a dense ceramic monolith substrate is engineered with an optimized precious metal catalytic loading (platinum, palladium, and rhodium) to restore factory exhaust scavenging, lower tailpipe emissions, and preserve OEM sensor feedback. Supplied mounting hardware and precision gaskets guarantee a rigid, exhaust-tight seal compatible with interchange \u003cstrong\u003e16351\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2003-2006 Acura MDX (Rear)\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;\"\u003e\n\u003cstrong\u003eJ35A5\u003c\/strong\u003e 3.5L V6 \/ \u003cstrong\u003eYD1\u003c\/strong\u003e\n\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;\"\u003e265 hp \/ 253 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;\"\u003e\n\u003cstrong\u003e16351\u003c\/strong\u003e (Mfg Ref: X3MK58)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Acura MDX Base \u0026amp; Touring 3.5L V6 (Rear)\u003c\/li\u003e\n  \u003cli\u003e2004 Acura MDX Base \u0026amp; Touring 3.5L V6 (Rear)\u003c\/li\u003e\n  \u003cli\u003e2005 Acura MDX Base \u0026amp; Touring 3.5L V6 (Rear)\u003c\/li\u003e\n  \u003cli\u003e2006 Acura MDX Base \u0026amp; Touring 3.5L V6 (Rear)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the YD1 MDX?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2003-2006 Acura MDX equipped with the \u003cstrong\u003eJ35A5\u003c\/strong\u003e engine in the rear exhaust position.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve an active P0420 diagnostic trouble code?\u003c\/strong\u003e\u003cbr\u003e Yes, replacing an exhausted rear substrate restores correct catalyst efficiency parameters to resolve downstream sensor fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Acura Engineering Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-mileage JDM luxury platforms, this emissions assembly maintains smooth low-end torque delivery, factory cabin acoustics, and reliable exhaust scavenging across severe daily driving conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501072847096,"sku":"DS-ELGJ8RCHI","price":133.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-acura-mdx-2003-2006-3-5l-rear-1.jpg?v=1789325909","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-acura-mdx-2003-2006-3-5l-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}