{"product_id":"ignition-coil-iridium-spark-plugs-for-hyundai-sonata-1999-2001-2-5l","title":"Ignition Coil + Iridium Spark Plugs for Hyundai Sonata (1999-2001) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Dielectric Ignition Coil and NGK Iridium Spark Plug Kit for 1999-2001 Hyundai Sonata (EF)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and NGK Iridium IX spark plug kit restores secondary ignition voltage and combustion efficiency on the 1999-2001 Hyundai Sonata to eliminate misfires and stabilize idle.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hyundai Sonata EF Coil Degradation\u003c\/h3\u003e\n\u003cp\u003eThe factory waste-spark ignition pack on the \u003cstrong\u003eEF\u003c\/strong\u003e platform sits directly atop the engine bay where thermal cycling degrades internal epoxy potting and copper windings over time. In the 2.5L \u003cstrong\u003eDelta G6BV\u003c\/strong\u003e, elevated underhood temperatures create micro-fractures in the coil body, causing dielectric breakdown, primary resistance drift, and high-voltage flashover to ground under load. Compounding this, standard copper or nickel factory plugs suffer rapid electrode erosion, expanding the spark gap beyond manufacturer tolerances and demanding higher firing voltages that accelerate total coil failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement pack features heavy-duty thermoplastic housing sealed with high-thermal-conductivity epoxy resin, isolating internal windings against moisture and heat soak. Paired with laser-welded \u003cstrong\u003eNGK Iridium IX (5464)\u003c\/strong\u003e spark plugs, the ultra-fine 0.6mm iridium center electrode substantially reduces required quenching voltage while promoting complete flame propagation. Designed to match factory dwell timing and secondary output curves, this matched system directly replaces OEM part \u003cstrong\u003e27301-37100\u003c\/strong\u003e (UF284) to eliminate persistent cylinder misfire codes (P0300-P0306) and hesitation under heavy throttle.\u003c\/p\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;\"\u003e1999-2001 Hyundai Sonata\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;\"\u003e2.5L Delta G6BV V6 \/ EF Chassis\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;\"\u003e170 hp \/ 166 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;\"\u003e27301-37100, UF284, 5C1157, GN10417, 0986221020\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\u003e1999 Hyundai Sonata Base \/ GLS 2.5L V6 (EF)\u003c\/li\u003e\n  \u003cli\u003e2000 Hyundai Sonata GLS 2.5L V6 (EF)\u003c\/li\u003e\n  \u003cli\u003e2001 Hyundai Sonata GLS 2.5L V6 (EF)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the EF Sonata?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2001 Hyundai Sonata equipped with the 2.5L \u003cstrong\u003eDelta G6BV\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo the NGK Iridium IX plugs require manual gapping before installation?\u003c\/h4\u003e\n\u003cp\u003eNo, the iridium center electrodes are pre-set and delicate; adjust only if verifying factory clearance with a non-contact feeler gauge.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hyundai Commuter Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to deliver clean combustion and factory-calibrated secondary voltage, this ignition kit keeps your commuter reliable and free of check-engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524636049656,"sku":"DS-ED5E8100Z","price":147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-hyundai-sonata-1999-2001-2-5l-1.jpg?v=1790460968","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-iridium-spark-plugs-for-hyundai-sonata-1999-2001-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}