{"product_id":"marine-ignition-module-for-chrysler-inboard-318-340-360-440-replaces-oem-3874020-sierra-18-5105","title":"Sierra 18-5105 Ignition Module - Replaces 3874020 - Chrysler Inboard 318, 340, 360, 440 Engines","description":"\u003cp\u003eThe Sierra 18-5105 Ignition Module is an electronic ignition component built for Chrysler Inboard engines, restoring reliable spark control on engines originally equipped with a Chrysler electronic ignition system. It is designed as a direct replacement for the OEM Chrysler Inboard ignition module 3874020, making it a straightforward swap when the factory unit fails or ages out. The module falls under Sierra's Standard Ignition B.I.D. Electronic Ignition line for Chrysler Inboard engines, and is compatible with Chrysler Inboard 318, 340, 360, and 440 cubic-inch engines, as well as M318, M340, 360, and 440 marine engine variants.\u003c\/p\u003e\u003cp\u003eHoused in a compact unit measuring 3.5 x 5.25 x 4.75 inches and weighing 0.97 pounds, the 18-5105 is sized to fit within the same mounting footprint as the original Chrysler ignition module it replaces. It ships as a single component ready for installation into the existing ignition wiring harness.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Chrysler Inboard Electronic Ignition Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 3874020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 3.5 x 5.25 x 4.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.97 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999318350\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e 318, 340, 360, 440 (1983-88); M318, M340, 360, 440 (1972-82)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChrysler Inboard 318, 340, 360, 440 cubic-inch engines (1983-88)\u003c\/li\u003e\n\u003cli\u003eChrysler Inboard M318, M340, 360, 440 cubic-inch engines (1972-82)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3874020\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5105 ignition module replace?\u003c\/strong\u003e The Sierra 18-5105 is a direct replacement for OEM Chrysler Inboard ignition module 3874020.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is the 18-5105 ignition module compatible with?\u003c\/strong\u003e It fits Chrysler Inboard 318, 340, 360, and 440 cubic-inch engines (1983-88), as well as M318, M340, 360, and 440 engines (1972-82).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5105 weigh?\u003c\/strong\u003e The Sierra 18-5105 ignition module weighs 0.97 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this ignition module?\u003c\/strong\u003e The Sierra 18-5105 measures 3.5 x 5.25 x 4.75 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-5105 an OEM Chrysler part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra aftermarket replacement built to match the form and function of OEM Chrysler Inboard part 3874020.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty comes with the Sierra 18-5105 ignition module?\u003c\/strong\u003e The Sierra 18-5105 carries a 90-day manufacturer warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system does the 18-5105 belong to?\u003c\/strong\u003e The 18-5105 is part of Sierra's Standard Ignition B.I.D. Electronic Ignition lineup for Chrysler Inboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5105 include mounting hardware or just the module?\u003c\/strong\u003e The Sierra 18-5105 ships as a single ignition module component for installation into the existing Chrysler Inboard ignition wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-5105 be used on both older and newer Chrysler Inboard engines?\u003c\/strong\u003e Yes, it covers both the M318, M340, 360, and 440 engines (1972-82) and the later 318, 340, 360, and 440 engines (1983-88).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5105 ignition module?\u003c\/strong\u003e The UPC for the Sierra 18-5105 ignition module is 030999318350.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988199387355,"sku":"SIE-18-5105","price":189.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5105_lg__29913.1558127317.500.750.jpg?v=1785188042","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-ignition-module-for-chrysler-inboard-318-340-360-440-replaces-oem-3874020-sierra-18-5105","provider":"Good Vibes Marina","version":"1.0","type":"link"}