{"product_id":"bdfhyk-ignition-coil-pack-iridium-spark-plugs-kit-for-3-5l-v6-set-of-6-uf401-4469-compatibility","title":"BDFHYK Ignition Coil Pack \u0026 Iridium Spark Plugs Kit for 3.5L V6 — Set of 6, UF401\/4469 Compatibility","description":"\u003cp\u003e\u003cstrong\u003eBDFHYK UF401 ignition coil pack and iridium spark plug 4469 kit replaces OEM coil and plugs for Nissan\/INFINITI 3.5L V6 engines, sold as a set of 6.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement kit combines six high-quality UF401 coil packs with iridium-tipped spark plugs (OE reference 4469 \/ LFR5AIX-11) engineered to fit 3.5L V6 Nissan and INFINITI models including 350Z, G35, FX35 and M35 from the early 2000s. Parts are built using improved electrical windings, durable rubber boots, and iridium electrodes to restore consistent ignition, reduce misfires, and extend service intervals versus worn factory components. Always verify OEM part numbers and fitment photos before ordering to ensure compatibility with your vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these coils and plugs affect engine starting and idle?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn ignition coils and plugs helps restore a steady spark, which improves cold starts and smooths idle irregularities. The iridium spark plugs require less voltage for a strong spark, while the coils’ upgraded materials stabilize current delivery under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFaster engine starts with stronger, more consistent sparks.\u003c\/li\u003e\n  \u003cli\u003eSmoother idle and fewer misfires at low RPM.\u003c\/li\u003e\n  \u003cli\u003eReduced stumbling during warm-up and light load driving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these parts fit my vehicle and how do I confirm compatibility?\u003c\/h3\u003e\n\u003cp\u003eThis set is designed for 3.5L V6 applications: INFINITI FX35 (2003–2008), G35 (2003–2007), M35 (2006–2008) and Nissan 350Z (2003–2006). You should cross-check your existing OEM numbers and compare the part photos before purchase to avoid fitment issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck OE references: UF401, 22448-AL61C, 22448-AL615 and spark plug 4469\/LFR5AIX-11.\u003c\/li\u003e\n  \u003cli\u003eCompare connector shape, mounting tabs, and coil boot length with your originals.\u003c\/li\u003e\n  \u003cli\u003eContact seller or consult vehicle parts diagram for model-year variations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and design features improve durability and performance?\u003c\/h3\u003e\n\u003cp\u003eBDFHYK coils use silicon steel cores, varnished copper windings, and high-grade rubber boots to resist heat and vibration. The spark plugs use an iridium center electrode and robust ceramic insulators for a long service life and consistent spark geometry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSilicon steel and varnished wire for reduced electrical losses and heat resistance.\u003c\/li\u003e\n  \u003cli\u003eJapan-imported rubber boots to prevent arcing and moisture ingress.\u003c\/li\u003e\n  \u003cli\u003eIridium electrode for precise, long-lasting spark performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can I tell when my car needs new coils and spark plugs?\u003c\/h3\u003e\n\u003cp\u003eCommon warning signs include rough idling, decreased throttle response, poor fuel economy, or a check engine light indicating misfires. If your vehicle has covered more than roughly 80,000 km (50,000 miles) or shows these symptoms, inspection and replacement are advisable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngine misfire codes or illumination of the check engine light.\u003c\/li\u003e\n  \u003cli\u003eStumbling, hesitation on acceleration, or increased fuel consumption.\u003c\/li\u003e\n  \u003cli\u003eOlder plugs\/coils showing corrosion, cracked boots, or excessive wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This BDFHYK coil and spark plug kit is aimed at owners and independent mechanics who need a complete ignition refresh for Nissan\/INFINITI 3.5L V6 vehicles from the 2003–2008 era. It’s intended for drivers troubleshooting misfires or performance loss, or for anyone performing scheduled maintenance wanting longer-life iridium plugs and upgraded coil materials. Confirm OEM references and visual fitment before installation; professional installation is recommended if you’re not experienced with ignition systems.\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: Does this kit replace factory coils and plugs for a 2004 350Z?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this set fits many 2003–2006 Nissan 350Z 3.5L V6 models, but verify your OEM numbers (e.g., 22448-AL61C or UF401) before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long do the iridium spark plugs last compared to standard plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Iridium plugs typically last significantly longer than copper plugs, often beyond 60,000–100,000 km depending on driving conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BDFHYK","offers":[{"title":"Default Title","offer_id":48082770165918,"sku":"B0BPM4D8GR","price":129.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bdfhyk-coil-pack-front-view_7d81be96-3345-402c-80be-cca9a3815637.jpg?v=1785813807","url":"https:\/\/northtrailauto.ca\/products\/bdfhyk-ignition-coil-pack-iridium-spark-plugs-kit-for-3-5l-v6-set-of-6-uf401-4469-compatibility","provider":"North Trail Auto","version":"1.0","type":"link"}