{"product_id":"tggkkparts-spark-plug-wire-kit-for-john-deere-825i-825i-s4-3-piece-copper-core-with-silicone-jacket","title":"TGGKKPARTS Spark Plug Wire Kit for John Deere 825i \u0026 825i S4 — 3‑Piece Copper Core with Silicone Jacket","description":"\u003cp\u003e\u003cstrong\u003eTGGKKPARTS spark plug wire kit is a three-piece copper-core replacement set designed to restore reliable ignition for John Deere 825i and 825i S4 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your John Deere 825i or 825i S4 is showing signs of misfires, weak starts, or reduced throttle response, worn ignition wires are a common, serviceable cause. This kit includes three precisely measured wires—one 13.5\", one 10\", and one 8\"—matching cylinders #1, #2 and #3 so you can replace only the faulty lines and retain correct routing. Built with a copper conductor and a heavy-duty silicone sleeve, these wires are engineered to maintain high voltage delivery while resisting heat, moisture and chemicals normally found under the hood.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these wires affect my engine’s ignition performance?\u003c\/h3\u003e\n\u003cp\u003eFresh ignition wires deliver a stronger, cleaner spark by reducing energy loss between the coil and spark plug. The copper core offers low resistance for efficient voltage transfer while the spiral winding design helps suppress interference. Together they support consistent combustion and smoother running.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCopper-core conductor for low electrical resistance\u003c\/li\u003e\n  \u003cli\u003eOptimized lengths for proper cylinder routing\u003c\/li\u003e\n  \u003cli\u003eSpiral winding and insulation that minimize signal leakage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the TGGKKPARTS wires durable in a tractor environment?\u003c\/h3\u003e\n\u003cp\u003eDurability comes from materials selected to withstand heat, oil, moisture and chemical exposure common in agricultural machinery. The heavy-duty silicone outer sleeve shields the internal winding core from degradation while corrosion-resistant components extend service life. These design choices reduce the chance of shorts, cracks or premature failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-temperature silicone jacket resists cracking and melting\u003c\/li\u003e\n  \u003cli\u003eMaterials chosen for corrosion and chemical resistance\u003c\/li\u003e\n  \u003cli\u003eConstruction targeted at long-term outdoor and heavy-use conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich models and parts do these wires replace, and what’s included?\u003c\/h3\u003e\n\u003cp\u003eThis kit is shaped specifically for John Deere 825i and 825i S4 models and corresponds to part numbers MIA11722, MIA11723 and MIA11724. The set includes one wire for each cylinder with exact lengths listed so installations are straightforward and routing stays correct. It’s intended as a direct-fit replacement for the three-wire ignition layout on those models.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with John Deere 825i and 825i S4\u003c\/li\u003e\n  \u003cli\u003eIncludes: 1 x MIA11722 (13.5\" for Cylinder #1), 1 x MIA11723 (10\" for Cylinder #2), 1 x MIA11724 (8\" for Cylinder #3)\u003c\/li\u003e\n  \u003cli\u003eDesign aligns with factory cylinder locations for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and maintain these spark plug wires?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a basic maintenance task: remove one old wire at a time to avoid misrouting, fit the new wire to the spark plug and coil or boot, and secure any retainers. Periodic inspection for cracks, loose boots or corrosion will help you catch wear before performance drops. Use dielectric grease on boots if recommended by your service guidance to aid connection and reduce moisture intrusion.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace wires one at a time to preserve firing order\u003c\/li\u003e\n  \u003cli\u003eCheck boots and terminals for tight fit and corrosion\u003c\/li\u003e\n  \u003cli\u003eInspect regularly and clean engine area of oil\/grease buildup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This TGGKKPARTS three-piece spark plug wire kit is aimed at John Deere 825i and 825i S4 owners, do-it-yourself mechanics, and small-farm technicians who need a direct-fit, durable replacement to restore proper ignition. If you want a cost-effective repair that targets misfires, rough idling or unreliable starts without replacing the entire ignition system, these copper-core wires provide a practical, vehicle-specific solution.\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 wires a direct fit for John Deere 825i S4?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit matches MIA11722, MIA11723 and MIA11724 and is sized for John Deere 825i and 825i S4 models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the wire lengths included in the kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The set includes three wires: 13.5\" (cylinder #1), 10\" (cylinder #2), and 8\" (cylinder #3).\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TGGKKPARTS","offers":[{"title":"Default Title","offer_id":48085635235998,"sku":"B09Q9678YQ","price":43.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/tggkkparts-front-packaging-john-deere-825i-wire-kit.jpg?v=1785875740","url":"https:\/\/northtrailauto.ca\/products\/tggkkparts-spark-plug-wire-kit-for-john-deere-825i-825i-s4-3-piece-copper-core-with-silicone-jacket","provider":"North Trail Auto","version":"1.0","type":"link"}