{"product_id":"ignition-coil-and-iridium-spark-plugs-for-kia-sorento-2003-2006-3-5l","title":"Ignition Coil and Iridium Spark Plugs for Kia Sorento (2003-2006) 3.5L","description":"\u003ch2\u003eDirect-Fit Ignition Tune-Up Kit for 2003-2006 Kia Sorento\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit replaces aged factory ignition components on the 2003-2006 Kia Sorento to eliminate engine misfires, restore lost combustion efficiency, and stabilize idle quality.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Kia Sorento Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe 3.5L V6 operates a wasted-spark configuration utilizing three dual-tower coil packs mounted over one bank with companion leads crossing over to the opposite cylinders. Subjected to sustained thermal cycling beneath the intake plenum, factory epoxy insulation degrades, creating microscopic fractures along the coil casing. This breakdown triggers internal secondary voltage leakage, dielectric punch-through, and carbon tracking under load. Coupled with standard nickel plug electrode erosion that broadens the spark gap beyond factory tolerance, the stock ignition system suffers from severe high-load misfires, rough idling, hesitation during throttle tip-in, and premature catalytic converter degradation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete refresh kit restores secondary ignition reserve with high-dielectric PBT polymer coil housings, vacuum-poured epoxy potting to resist thermal shock, and precision-wound copper secondary windings that output consistent spark energy across the operating range. Paired with fine-wire iridium electrode spark plugs, this setup lowers ignition voltage demand while resisting spark erosion and carbon fouling. The narrow iridium center pin concentrates spark energy for faster flame kernel expansion and complete fuel combustion, resolving common P0300 through P0306 misfire codes on the \u003cstrong\u003eG6CU\u003c\/strong\u003e powerplant without modifications.\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 Kia Sorento\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\u003e3.5L G6CU Sigma V6\u003c\/strong\u003e \/ \u003cstrong\u003eBL\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;\"\u003e192 hp \/ 217 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\u003eUF431\u003c\/strong\u003e, \u003cstrong\u003e3730039800\u003c\/strong\u003e, 27300-39800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Kia Sorento EX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2003 Kia Sorento LX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2004 Kia Sorento EX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2004 Kia Sorento LX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2005 Kia Sorento EX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2005 Kia Sorento LX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2006 Kia Sorento EX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n  \u003cli\u003e2006 Kia Sorento LX Sport Utility 4-Door 3.5L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the BL Sorento?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2003-2006 Kia Sorento equipped with the \u003cstrong\u003eG6CU\u003c\/strong\u003e 3.5L V6 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the intake manifold gaskets need replacement during this service?\u003c\/strong\u003e\u003cbr\u003e Yes, the upper intake manifold plenum must be unbolted to access the passenger-side spark plugs and coils, making new plenum gaskets mandatory during installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Kia Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt on a rugged body-on-frame platform, the first-generation Sorento demands reliable secondary ignition output to maintain rated towing capacity and low-end torque. This kit delivers OEM harness integration and thermal resistance suited for heavy-duty hauling and off-pavement operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50594461548792,"sku":"DS-EYLU5AKF0","price":79.95,"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-kia-sorento-2003-2006-3-5l-1.jpg?v=1790058932","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-and-iridium-spark-plugs-for-kia-sorento-2003-2006-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}