{"product_id":"cummins-3919343-aftermarket-fuel-injector","title":"Cummins 3919343 Aftermarket Fuel Injector","description":"\u003cdiv style=\"font-family:Roboto,sans-serif;color:#1a1a1a;line-height:1.6\"\u003e\n\u003cstyle\u003e@import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto+Condensed:wght@700\u0026family=Roboto:wght@400;700;900\u0026display=swap');.spm-c{border:1px solid #d1d1d1;background:#fff;margin-bottom:25px;overflow:hidden}.spm-h{padding:15px 20px;background:#ffce02;border-bottom:1px solid #d1d1d1;font-weight:900;text-transform:uppercase;font-size:16px;color:#000;letter-spacing:.05em;font-family:'Roboto Condensed',sans-serif}.spm-t{width:100%;border-collapse:collapse;font-size:15px}.spm-t th{padding:12px 10px;text-align:left;background:#f4f4f4;font-size:12px;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid #d1d1d1;color:#000}.spm-t td{padding:11px 10px;border-bottom:1px solid #eee;text-align:left;vertical-align:top}.spmL{font-weight:700;color:#333;background:#fcfcfc;width:38%}.spm-sub{display:block;color:#777;font-size:12.5px;margin-top:2px}.spm-chip{display:inline-block;margin:0 8px 8px 0;padding:6px 12px;border:1px solid #d1d1d1;background:#fcfcfc;font-size:14px;font-weight:700;color:#000}.spm-h2{font-family:'Roboto Condensed',sans-serif;font-size:24px;font-weight:900;color:#000;text-transform:uppercase;margin:40px 0 20px;letter-spacing:.05em;border-bottom:3px solid #ffce02;padding-bottom:15px}.spm-p{font-size:16px;line-height:1.8;margin:0 0 18px}@media(max-width:700px){.spmL{width:auto}}\u003c\/style\u003e\n\u003cp class=\"spm-p\"\u003eAftermarket replacement fuel injector for Cummins 4BT and 6BT engines. It replaces Cummins part number 3919343: the fuel injector listed by Cummins as part number 3919343.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003eFits Cummins 4BT and 6BT engines. It is built to the same mounting, wiring and connector layout as the part it replaces, so it fits in place of the old one without changes to the machine.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003eCheck the part number on the label of the old unit, or in the parts manual for your machine's serial number range, before ordering. Sold as a single unit, shipped worldwide.\u003c\/p\u003e\n\u003ch2 class=\"spm-h2\"\u003eTechnical Properties \u0026amp; Sizes\u003c\/h2\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable class=\"spm-t\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003ePart Type\u003c\/td\u003e\n\u003ctd\u003eFuel Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eReplaces\u003c\/td\u003e\n\u003ctd\u003eCummins 3919343\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eFits\u003c\/td\u003e\n\u003ctd\u003eCummins 4BT and 6BT engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew, aftermarket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eStat. HS-Code\u003c\/td\u003e\n\u003ctd\u003e840999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003eCompatibility\u003c\/div\u003e\n\u003cdiv style=\"padding:20px\"\u003e\n\u003cp style=\"margin:0 0 10px;font-weight:700;color:#333\"\u003eCummins machines and engines\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan class=\"spm-chip\"\u003eCummins 4BT and 6BT engines\u003c\/span\u003e\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#666;margin:0 0 18px\"\u003eCheck the part number on your old unit before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spm-c\"\u003e\n\u003cdiv class=\"spm-h\"\u003eFind Your Size by Part Number\u003c\/div\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable class=\"spm-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eCummins Part No.\u003cspan class=\"spm-sub\"\u003e(SPM Part No.)\u003c\/span\u003e\n\u003c\/th\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003e1 Piece\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e3919343\u003c\/strong\u003e\u003cspan class=\"spm-sub\"\u003e(SPM-HEP-2460)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eCummins 4BT and 6BT engines\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"spm-h2\"\u003eApplications \u0026amp; Use Cases\u003c\/h2\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eRough running and misfire\u003c\/strong\u003e\u003cbr\u003eA worn or sticking injector sprays unevenly: the engine knocks, misfires or idles rough. A cylinder cut-out test finds the bad one.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eSmoke and fuel use\u003c\/strong\u003e\u003cbr\u003eBlack smoke and rising fuel use point to dribbling nozzles. Replace injectors before they wash the cylinder walls.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eHard starting\u003c\/strong\u003e\u003cbr\u003eLeaking injectors bleed fuel pressure back and make the engine crank longer, especially when hot.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003e\u003cstrong\u003eFitting tips\u003c\/strong\u003e\u003cbr\u003eFit new copper washers and seals, clean the seat in the head, and torque the clamp to the engine maker's figure.\u003c\/p\u003e\n\u003ch2 class=\"spm-h2\"\u003ePrice Beat Guarantee\u003c\/h2\u003e\n\u003cp class=\"spm-p\"\u003eFound this part cheaper elsewhere? Send us the listing and we will beat it under our \u003ca href=\"\/pages\/find-it-cheaper-we-will-beat-it-by-5\" style=\"color:#000;text-decoration:underline\"\u003ePrice Beat Guarantee\u003c\/a\u003e. Every order is also covered by our \u003ca href=\"\/pages\/30-day-money-back-guarante\" style=\"color:#000;text-decoration:underline\"\u003e30 day money back guarantee\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"spm-p\"\u003eOur price of USD 26.40 is approximately 20% less than the aftermarket prices we compared it with:\u003c\/p\u003e\n\u003ctable class=\"spm-t\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eeBay, aftermarket seller\u003c\/td\u003e\n\u003ctd\u003eUSD 33.00 (checked 5 Oct 2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eeBay, aftermarket seller\u003c\/td\u003e\n\u003ctd\u003eUSD 33.00 (checked 5 Oct 2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spmL\"\u003eeBay, aftermarket seller\u003c\/td\u003e\n\u003ctd\u003eUSD 33.00 (checked 5 Oct 2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2 class=\"spm-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eIs this a genuine Cummins part?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eNo. It is an aftermarket part made to fit in place of Cummins 3919343. It is not made by or affiliated with Cummins; the Cummins part number is used only to show what it replaces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eWill it fit my machine?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eIt fits Cummins 4BT and 6BT engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eDoes it fit without changes?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eIt is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:22px;padding:15px;background:#f9f9f9;border-left:4px solid #ffce02\"\u003e\n\u003ch4 style=\"margin:0 0 8px;font-size:15px;font-weight:700\"\u003eDo you ship to my country?\u003c\/h4\u003e\n\u003cp style=\"margin:0;font-size:14px;line-height:1.7;color:#333\"\u003eYes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our \u003ca href=\"\/pages\/30-day-money-back-guarante\" style=\"color:#000;text-decoration:underline\"\u003e30 day money back guarantee\u003c\/a\u003e and \u003ca href=\"\/pages\/find-it-cheaper-we-will-beat-it-by-5\" style=\"color:#000;text-decoration:underline\"\u003eprice beat guarantee\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top:50px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#d1d1d1;border:1px solid #d1d1d1;margin-bottom:20px\" class=\"spm-trust\"\u003e\n\u003ca href=\"\/pages\/30-day-money-back-guarante\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4zm-2 16l-4-4 1.41-1.41L10 14.17l6.59-6.59L18 9l-8 8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003e30-Day Money Back Guarantee\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/pages\/delivery-information\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003eWorldwide Delivery\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/pages\/find-it-cheaper-we-will-beat-it-by-5\" style=\"background:#fff;padding:40px 15px;text-decoration:none;display:flex;flex-direction:column;align-items:center;text-align:center;color:#1a1a1a\"\u003e\u003csvg style=\"width:32px;height:32px;margin-bottom:15px;fill:#ffce02\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M21.41 11.58l-9-9C12.05 2.22 11.55 2 11 2H4c-1.1 0-2 .9-2 2v7c0 .55.22 1.05.59 1.42l9 9c.36.36.86.58 1.41.58.55 0 1.05-.22 1.41-.59l7-7c.37-.36.59-.86.59-1.41 0-.55-.23-1.06-.59-1.42zM5.5 8.25c-.69 0-1.25-.56-1.25-1.25s.56-1.25 1.25-1.25 1.25.56 1.25 1.25-.56 1.25-1.25 1.25z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-family:'Roboto Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:0.1em\"\u003ePrice Beat Guarantee\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this a genuine Cummins part?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It is an aftermarket part made to fit in place of Cummins 3919343. It is not made by or affiliated with Cummins; the Cummins part number is used only to show what it replaces.\"}}, {\"@type\": \"Question\", \"name\": \"Will it fit my machine?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It fits Cummins 4BT and 6BT engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.\"}}, {\"@type\": \"Question\", \"name\": \"Does it fit without changes?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.\"}}, {\"@type\": \"Question\", \"name\": \"Do you ship to my country?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.\"}}]}]}\u003c\/script\u003e","brand":"Spare Part Mart","offers":[{"title":"1 Piece","offer_id":67565391511852,"sku":"SPM-HEP-2460-P1","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/9152\/6700\/files\/ph_cummins-3919343.jpg?v=1791131560","url":"https:\/\/sparepartmart.co\/products\/cummins-3919343-aftermarket-fuel-injector","provider":"Spare Part Mart","version":"1.0","type":"link"}