{"product_id":"kacuyelin-iridium-spark-plugs-set-of-4-4469-lfr5aix-11-compatible-with-2-5l-toyota-nissan-long-life","title":"KacuYelin Iridium Spark Plugs Set of 4 — 4469 LFR5AIX-11 Compatible with 2.5L Toyota\/Nissan, Long-Life","description":"\u003cp\u003e\u003cstrong\u003eKacuYelin Iridium Spark Plugs 4469 are a set of four high-durability iridium ignition plugs designed to replace OE LFR5AIX-11 style spark plugs in many 2.4–2.7L and 2.5L engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese KacuYelin plugs are engineered as direct-fit replacements for a wide range of late-model Toyotas, Nissans, Kias, Hyundais, Jeeps and other makes where the OE reference numbers like 4469, LFR5AIX-11 and similar are specified. Manufactured in TS16949-certified facilities, the plugs use an iridium-tipped center electrode for consistent spark delivery, extended life and improved ignition stability across idle and high-RPM conditions. Before purchasing, verify fit with your vehicle’s thread size and heat range to ensure correct installation.\u003c\/p\u003e\n\n\u003ch3\u003eWill these plugs fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers many models with 2.4–2.7L and 2.5L engines; examples include Toyota Camry (2010–2017 2.5L), RAV4 (2009–2018 2.5L), Highlander (2009–2019 2.7L), Scion tC (2011–2016 2.5L), Nissan Altima (2002–2006 2.5L) and Sentra variants. Use the manufacturer’s fit tool or compare the OE reference numbers and thread specifications to be certain.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatches OE references: 4469, LFR5AIX-11 and equivalent part numbers.\u003c\/li\u003e\n  \u003cli\u003eSuitable for many Toyota, Nissan, Kia, Hyundai, Jeep, Suzuki and Fiat\/Chrysler models listed in product details.\u003c\/li\u003e\n  \u003cli\u003eConfirm thread length, hex size and heat range before installing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these iridium plugs affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eIridium electrodes offer a smaller, more durable tip than standard nickel plugs, delivering a concentrated spark that helps with consistent combustion and longer service life. They won’t cure mechanical or fuel system faults, but they help reduce misfires and support smoother idling when installed correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium tip for stable spark and longer replacement intervals.\u003c\/li\u003e\n  \u003cli\u003eDesigned to reduce misfire and irregular idling when used in compatible engines.\u003c\/li\u003e\n  \u003cli\u003eCan help maintain fuel efficiency by stabilizing ignition timing and combustion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying and installing these plugs?\u003c\/h3\u003e\n\u003cp\u003eAlways verify fitment using a reliable fit tool or by matching the old plug’s thread length, seat type and heat range to the new plug. Incorrect thread size or an unsuitable heat range can damage the engine or cause poor running.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse the \"amazonconfirmedfit\" or OEM fit tool to confirm compatibility.\u003c\/li\u003e\n  \u003cli\u003eCompare heat range and electrode shape to the original plug—difference should be minimal.\u003c\/li\u003e\n  \u003cli\u003eClean the spark plug hole, hand-start threads, and torque to vehicle manual specs during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and reliable are KacuYelin plugs?\u003c\/h3\u003e\n\u003cp\u003eKacuYelin builds these plugs in TS16949-certified factories and subjects them to quality testing aimed at addressing common ignition issues like misfire, surging and rough idle. The iridium construction and manufacturing controls are intended to provide predictable high-voltage output throughout the engine’s operating range.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProduced in certified facilities with R\u0026amp;D and quality inspections.\u003c\/li\u003e\n  \u003cli\u003eDesigned to handle common ignition symptoms when used in compatible engines.\u003c\/li\u003e\n  \u003cli\u003eSold as a set of four, referencing multiple OEM numbers for cross-compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and home mechanics seeking a long-life, OEM-style iridium replacement for vehicles that call for LFR5AIX-11 or equivalent spark plugs—especially owners of Toyota Camry, RAV4, Highlander, Venza, Scion tC and certain Nissan, Kia, Hyundai and Jeep models who want a durable, precision spark plug from a manufacturer with certified production and product support. If you’re unsure about fit or heat range, compare your old plug to the new one or consult a mechanic before installation.\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: Are these plugs a direct replacement for OE LFR5AIX-11?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — they match common OE references like 4469 and LFR5AIX-11, but confirm thread length and heat range before installing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long do KacuYelin iridium plugs typically last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Iridium plugs generally outlast standard plugs; lifespan varies by driving conditions but they are designed for extended service life.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KacuYelin","offers":[{"title":"Default Title","offer_id":48084542554270,"sku":"B0G1LL2RLW","price":31.38,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/kacuyelin-front-packaging-iridium-4469.jpg?v=1785859288","url":"https:\/\/northtrailauto.ca\/products\/kacuyelin-iridium-spark-plugs-set-of-4-4469-lfr5aix-11-compatible-with-2-5l-toyota-nissan-long-life","provider":"North Trail Auto","version":"1.0","type":"link"}