{"product_id":"ngk-v-power-spark-plug-zfr5n-6-pack-for-jeep-grand-cherokee-4-0l-oem-fit-direct-replacement","title":"NGK V-Power Spark Plug ZFR5N 6-Pack for Jeep Grand Cherokee 4.0L — OEM Fit, Direct Replacement","description":"\u003cp\u003e\u003cstrong\u003eNGK V-Power ZFR5N (3459) is a genuine replacement spark plug sold in a 6-pack engineered to restore reliable ignition for 1999–2004 Jeep Grand Cherokee 4.0L engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese NGK V-Power ZFR5N spark plugs (part number 3459) are OEM-quality ignition components supplied as a six-piece set. They are designed as direct-fit replacements for the 4.0L\/242 inline-six engines used in Jeep Grand Cherokee Limited and similar models from 1999 to 2004. Each plug comes in original NGK packaging and includes the necessary hardware, making installation straightforward for mechanics and DIYers who want factory-style performance.\u003c\/p\u003e\n\n\u003ch3\u003eWill these spark plugs fit my 1999–2004 Jeep Grand Cherokee 4.0L?\u003c\/h3\u003e\n\n\u003cp\u003eYes — these are specified as direct replacements for the 4.0L\/242 engines in Grand Cherokee models from 1999 through 2004. Always verify fitment against your vehicle’s VIN or parts guide before purchase.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePart number: NGK ZFR5N (3459)\u003c\/li\u003e\n  \u003cli\u003eVehicle compatibility: Jeep Grand Cherokee 4.0L\/242, 1999–2004\u003c\/li\u003e\n  \u003cli\u003eSold as a 6-pack to replace all cylinder plugs\u003c\/li\u003e\n  \u003cli\u003eConfirm fit with your vehicle’s OEM specs or the seller’s fitment tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these NGK V-Power plugs affect engine performance?\u003c\/h3\u003e\n\n\u003cp\u003eAs direct replacement ignition parts, NGK V-Power plugs restore consistent spark delivery and combustion timing when old plugs have worn. They help maintain engine smoothness, throttle response, and reliable starting when installed in proper condition.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConsistent gap and electrode geometry for stable ignition\u003c\/li\u003e\n  \u003cli\u003eDesigned for OEM-equivalent heat range and durability\u003c\/li\u003e\n  \u003cli\u003eSold in a six-pack to replace all cylinders for balanced performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and what should I expect during installation?\u003c\/h3\u003e\n\n\u003cp\u003eThe package contains six NGK V-Power 3459 spark plugs in original NGK packaging with any factory-supplied hardware. Installation is straightforward for anyone familiar with spark plug replacement, but follow torque specs and gap checks for best results.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSix genuine NGK ZFR5N (3459) spark plugs\u003c\/li\u003e\n  \u003cli\u003eOriginal NGK packaging and included hardware\u003c\/li\u003e\n  \u003cli\u003eRecommended: check gap, use correct torque, replace one plug at a time\u003c\/li\u003e\n  \u003cli\u003eConfirm vehicle fitment using seller’s tool or vehicle manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I maintain or check these plugs after installation?\u003c\/h3\u003e\n\n\u003cp\u003ePeriodic inspection during routine tune-ups helps identify wear, fouling, or incorrect heat range before performance is affected. Replace plugs at manufacturer-recommended intervals or sooner if you observe misfires, rough idle, or increased fuel use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eInspect electrodes and insulator for wear or deposits\u003c\/li\u003e\n  \u003cli\u003eCheck and set spark plug gap if necessary before installation\u003c\/li\u003e\n  \u003cli\u003eReplace in matched sets (all six) for consistent ignition\u003c\/li\u003e\n  \u003cli\u003eFollow torque specs to avoid seat or thread damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This 6-pack of NGK V-Power ZFR5N (3459) spark plugs is intended for Jeep owners, mechanics, and restoration enthusiasts working on 1999–2004 Grand Cherokee models with the 4.0L\/242 engine who want genuine OEM-equivalent ignition parts. Choose this set if you need a full-cylinder replacement with original-brand packaging and straightforward installability — ideal for scheduled tune-ups, preventative maintenance, or restoring engine response after long-term use.\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 NGK plugs compatible with other engines besides the 4.0L Jeep?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This specific ZFR5N (3459) set is specified for 4.0L\/242 Jeep Grand Cherokee 1999–2004; check part cross-reference for other applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Should I replace all six spark plugs at once?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Replacing all six plugs at the same time ensures balanced ignition and consistent engine performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":67589327749305,"sku":"B07XDD8HDG","price":76.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/ngk-v-power-front-packaging_fca2123e-6436-4005-811d-30b86f1dd335.jpg?v=1790529783","url":"https:\/\/redleafauto.ca\/products\/ngk-v-power-spark-plug-zfr5n-6-pack-for-jeep-grand-cherokee-4-0l-oem-fit-direct-replacement","provider":"Redleaf Auto","version":"1.0","type":"link"}