{"product_id":"kacuyelin-uf349-ignition-coil-pack-iridium-spark-plugs-set-of-6-3-5l-4-0l-v6-fit-oem-style-durable-performance","title":"KacuYelin UF349 Ignition Coil Pack \u0026 Iridium Spark Plugs Set of 6 — 3.5L\/4.0L V6 Fit, OEM-Style Durable Performance","description":"\u003cstrong\u003eComplete ignition kit of six KacuYelin UF349 coil packs and six iridium spark plugs engineered to restore reliable firing and smooth performance for compatible Nissan and Infiniti V6 engines.\u003c\/strong\u003e\n\n\u003cp\u003eThis plug-and-play kit pairs German-grade coil packs with long-life iridium spark plugs to replace worn ignition components on many 3.5L and 4.0L V6 Nissan, Infiniti and related models. Each coil uses high-purity copper windings, a silicon steel core and heat-resistant epoxy for consistent high-voltage delivery. The iridium plugs employ a precision laser-welded center electrode and robust ceramic insulators to resist wear and carbon buildup.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles will this set fit?\u003c\/h3\u003e\n\u003cp\u003eThis set is designed for a range of Nissan, Infiniti and compatible vehicles using the 3.5L or 4.0L V6 engines. Always confirm fitment by matching your car’s year, make, model and engine to ensure correct compatibility before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInfiniti I35 (2002–2004), QX4 (2001–2003 post 07\/01)\u003c\/li\u003e\n  \u003cli\u003eNissan Altima (2002–2006 3.5L), Maxima (2002–2008), Murano (2003–2008)\u003c\/li\u003e\n  \u003cli\u003eFrontier (2005–2019 4.0L), Xterra (2005–2015 4.0L), Pathfinder (2001–2012 variants)\u003c\/li\u003e\n  \u003cli\u003eQuest (2004–2009), NV1500\/2500\/3500 (2012–2019 4.0L), Suzuki Equator (2009–2012)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do the coil packs and plugs improve engine performance?\u003c\/h3\u003e\n\u003cp\u003eThe coils deliver steady, high-voltage output while the iridium spark plugs provide a concentrated spark and improved durability. Together they reduce misfires and uneven idle, helping the engine run more smoothly and predictably under normal driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCoils: corrosion-resistant materials and premium windings for stable voltage\u003c\/li\u003e\n  \u003cli\u003ePlugs: 360° laser-welded iridium electrode for focused ignition\u003c\/li\u003e\n  \u003cli\u003eCombined: fewer ignition faults and steadier combustion cycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build quality and materials used?\u003c\/h3\u003e\n\u003cp\u003eKacuYelin sources components and manufactures these parts in TS16949-quality production environments. The coils use high-purity copper windings, silicon steel cores and high-temperature epoxy, while the spark plugs feature high-alumina ceramic insulators and nickel-alloy shells for rust resistance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCoil construction: anti-oxidation coatings and corrosion-resistant components\u003c\/li\u003e\n  \u003cli\u003eSpark plugs: up to 90% nickel content and 95% alumina ceramic for insulation\u003c\/li\u003e\n  \u003cli\u003eManufacturing standard: produced in TS16949-certified facilities\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these parts easy to install and what should I check before buying?\u003c\/h3\u003e\n\u003cp\u003eYes — the kit is designed to match OEM specifications for direct replacement and generally installs with basic hand tools. Before ordering, verify your vehicle’s exact year, model, engine displacement and aspiration so the parts align with the original OEM fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlug-and-play design matches OEM specifications for direct swap\u003c\/li\u003e\n  \u003cli\u003eConfirm year, make, model, engine size in the seller’s fitment tool\u003c\/li\u003e\n  \u003cli\u003eIf unsure, compare OEM part numbers like UF349 or 224488J115\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This KacuYelin ignition kit is aimed at owners and technicians maintaining mid-2000s Nissan and Infiniti V6 vehicles who want a high-quality, cost-effective replacement for failing coils and worn spark plugs. It suits DIYers comfortable with basic engine work and professional shops replacing multiple ignition components at once. If your vehicle has repeated misfires, rough idle or you’re following scheduled ignition service intervals, this complete set provides matched components to restore consistent performance and help reduce ignition-related issues.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these coils and plugs fit my 2005 Nissan Frontier 4.0L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the kit lists compatibility with Frontier 4.0L models from 2005–2019; verify with your exact year and VIN to be certain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the expected lifespan of the iridium spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under normal use the iridium plugs are designed for long life, often lasting tens of thousands of miles; actual life varies by driving conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KacuYelin","offers":[{"title":"Default Title","offer_id":48084019576990,"sku":"B0F9WMHRKQ","price":103.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/kacuyelin-coil-pack-front-view_175b1ca9-aaaa-404c-8205-2bab9ade90e1.jpg?v=1785843654","url":"https:\/\/northtrailauto.ca\/products\/kacuyelin-uf349-ignition-coil-pack-iridium-spark-plugs-set-of-6-3-5l-4-0l-v6-fit-oem-style-durable-performance","provider":"North Trail Auto","version":"1.0","type":"link"}