{"product_id":"ignition-coil-and-iridium-spark-plugs-for-hyundai-xg350-2003-2005-3-5l","title":"Ignition Coil and Iridium Spark Plugs for Hyundai XG350 (2003-2005) 3.5L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2003-2005 Hyundai XG350\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Ignition Coil and Iridium Spark Plug Kit restores secondary ignition voltage and combustion efficiency on the 2003-2005 Hyundai XG350 to eliminate cylinder misfires, stabilize erratic idle, and restore lost engine power.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hyundai XG350 Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eOn the \u003cstrong\u003eXG\u003c\/strong\u003e chassis equipped with the 3.5L \u003cstrong\u003eSigma G6CU\u003c\/strong\u003e V6, the factory waste-spark ignition configuration subjects the three bank-mounted coils to severe thermal degradation beneath the engine acoustic cover. Over prolonged run times, excessive heat soak deteriorates the internal epoxy potting and breakdown occurs across the copper primary and secondary windings. As internal insulation degrades, dielectric breakdown causes spark energy leakage and micro-arcing. Compounded by widened gaps on worn factory spark plugs, the elevated voltage demand overburdens the coils, triggering P0300-series misfire diagnostic trouble codes, poor throttle response, and incomplete fuel burn that risks catalyst contamination.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive refresh kit replaces failing components with three high-dielectric pencil ignition coils and six fine-wire iridium spark plugs engineered to withstand aggressive thermal cycling. The replacement coils utilize reinforced thermoplastic housings filled with high-grade polyurethane epoxy to insulate against voltage punch-through and resist vibrational stress. Paired with laser-welded fine-wire iridium center electrodes, the system significantly lowers the required firing voltage while generating a hotter, more concentrated spark kernel. This waste-spark matched setup prevents carbon fouling, stabilizes secondary circuit impedance, and ensures complete combustion under high engine load without premature gap erosion.\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;\"\u003e2003-2005 Hyundai XG350\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 Sigma G6CU V6 \/ XG\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;\"\u003e194 hp \/ 216 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;\"\u003eUF439, 06C905115A, 06C905115B, 06C905115D, 06C905115E, KIN119959TOP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Hyundai XG350 Base 3.5L V6 (G6CU)\u003c\/li\u003e\n  \u003cli\u003e2003 Hyundai XG350 L 3.5L V6 (G6CU)\u003c\/li\u003e\n  \u003cli\u003e2004 Hyundai XG350 Base 3.5L V6 (G6CU)\u003c\/li\u003e\n  \u003cli\u003e2004 Hyundai XG350 L 3.5L V6 (G6CU)\u003c\/li\u003e\n  \u003cli\u003e2005 Hyundai XG350 Base 3.5L V6 (G6CU)\u003c\/li\u003e\n  \u003cli\u003e2005 Hyundai XG350 L 3.5L V6 (G6CU)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the XG XG350?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2003-2005 Hyundai XG350 equipped with the \u003cstrong\u003eSigma G6CU\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are there only three coils included for a six-cylinder engine?\u003c\/strong\u003e\u003cbr\u003e The 3.5L \u003cstrong\u003eSigma G6CU\u003c\/strong\u003e utilizes a waste-spark ignition arrangement where three primary coils each fire two cylinders simultaneously.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hyundai Executive Sedan Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet original equipment tolerance thresholds, this ignition overhaul ensures smooth power delivery, clean emissions, and dependable highway cruising without recurring check engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50604908904696,"sku":"DS-EHEZQOTM8","price":85.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-hyundai-xg350-2003-2005-3-5l-1.jpg?v=1790089291","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-hyundai-xg350-2003-2005-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}