{"product_id":"x4xz-ignition-coil-double-iridium-spark-plug-kit-6-piece-for-nissan-infiniti-3-5l-4-0l-oe-22448-al61c-direct-fit-long-life","title":"X4XZ Ignition Coil \u0026 Double Iridium Spark Plug Kit — 6‑Piece for Nissan\/Infiniti 3.5L–4.0L, OE 22448‑AL61C — Direct Fit, Long‑Life","description":"\u003cp\u003e\u003cstrong\u003eThe X4XZ UF401 ignition coil and 4469 double iridium spark plug 6-piece kit replaces worn ignition components to restore smoother starts, steadier idle, and improved throttle response for compatible Nissan and Infiniti engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle shows signs of misfires, rough idling, or reduced power, replacing neglected coils and plugs can often resolve those issues. This kit includes six ignition coil packs and six double iridium spark plugs designed to meet or exceed original equipment specifications and fit a range of Nissan and Infiniti V6 and V8 applications. Components are built for durability and consistent spark delivery so installation is straightforward and the engine runs more reliably.\u003c\/p\u003e\n\n\u003ch3\u003eWhich models and years will this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis kit is engineered for many Nissan and Infiniti vehicles with 3.5L and 4.0L engines. It covers popular models across early-2000s to late-2010s model years, but always verify compatibility against your vehicle’s OEM number before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Nissan Altima (2002–2006 3.5L), Maxima (2002–2008 3.5L), 350Z (2003–2006 3.5L).\u003c\/li\u003e\n  \u003cli\u003eSupports Frontier, Pathfinder, Xterra, and NV series with listed years and displacements.\u003c\/li\u003e\n  \u003cli\u003eIncludes Infiniti coverage for FX35, G35, M35, I35 and QX4 model years indicated.\u003c\/li\u003e\n  \u003cli\u003eCheck the second main product image or OE reference 22448-AL61C to confirm fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these ignition coils and double iridium spark plugs improve performance?\u003c\/h3\u003e\n\u003cp\u003eThe coils and iridium plugs are designed to produce steady, reliable sparks across operating conditions. Better high-voltage transfer and a durable iridium tip combine to reduce misfires, improve cold starts, and maintain combustion efficiency over a long service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble iridium electrodes for extended lifespan and consistent ignition.\u003c\/li\u003e\n  \u003cli\u003eHigh-quality coil materials and ferrite noise suppression to prevent radio interference.\u003c\/li\u003e\n  \u003cli\u003eThermoplastic connectors resist heat cycling and reduce connector failures.\u003c\/li\u003e\n  \u003cli\u003eDirect-fit design to simplify installation and match OE electrical characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the quality and durability features of this kit?\u003c\/h3\u003e\n\u003cp\u003eEach component is manufactured to meet or improve upon OEM design to deliver reliable operation over many miles. The iridium plugs are rated for long service intervals, while the coils use stainless-steel internals and noise suppression to protect electrical systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium plugs offer long working life—consistent performance up to roughly 100,000 kilometers under normal use.\u003c\/li\u003e\n  \u003cli\u003eStainless-steel springs and internal ferrite reduce electrical noise and ensure cleaner signal transmission.\u003c\/li\u003e\n  \u003cli\u003eRobust thermoplastic coil connectors resist heat-related cracking and maintain tight connections.\u003c\/li\u003e\n  \u003cli\u003eOE reference numbers included for cross-checking and correct replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and what support is provided?\u003c\/h3\u003e\n\u003cp\u003eThe package contains six ignition coil packs and six double iridium spark plugs—sufficient to service one cylinder bank or an entire V6\/V8 ignition system depending on your vehicle. No printed manual is included, but customer support and a one-year product service are offered if you run into fitment or quality issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContents: 6 x ignition coils, 6 x double iridium spark plugs (no paper manual).\u003c\/li\u003e\n  \u003cli\u003eOE and replacement cross-reference numbers listed for compatibility checks.\u003c\/li\u003e\n  \u003cli\u003e24-hour customer service and one-year coverage for product-related concerns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This X4XZ kit is intended for DIY mechanics and professional technicians who need a complete ignition coil and spark plug replacement for compatible Nissan or Infiniti vehicles. It suits owners dealing with misfires, rough idle, reduced fuel efficiency, or anyone performing scheduled ignition maintenance who wants longer-life plugs and reliable coils that align with OEM specifications.\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 the 2005 Nissan Frontier 4.0L. Confirm using OE# 22448-AL61C or your vehicle’s service manual before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long will the double iridium spark plugs last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Double iridium plugs are designed for extended life and consistent performance, typically up to about 100,000 kilometers under normal driving conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"X4XZ","offers":[{"title":"Default Title","offer_id":48080646766750,"sku":"B0D4LPS4HQ","price":115.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/x4xz-kit-front-packaging_fb93ad5b-9999-484a-b716-7196fcee36f0.jpg?v=1785783573","url":"https:\/\/northtrailauto.ca\/products\/x4xz-ignition-coil-double-iridium-spark-plug-kit-6-piece-for-nissan-infiniti-3-5l-4-0l-oe-22448-al61c-direct-fit-long-life","provider":"North Trail Auto","version":"1.0","type":"link"}