{"product_id":"liftmaster-k74-50278-elite-q403-electronic-box-assembly","title":"LiftMaster K74-50278 (Elite Q403) Electronic Box Assembly","description":"\u003ch2\u003eReplacement Electronic Box Assembly for SL3000 \/ CSW200\u003c\/h2\u003e\n\u003cp\u003eThe LiftMaster K74-50278 (Elite Q403) is a genuine electronic box assembly used on select LiftMaster ELITE swing and slide gate operators. It is commonly referenced as Elite Q403 and may also be listed as Q402 depending on the operator configuration and parts breakdown. This assembly is used to restore a damaged or missing electronics enclosure and related internal connections so the operator can be serviced and returned to proper operation. Always confirm fitment using the operator manual or replacement parts diagram before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e control board, wire harnesses are not included.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine LiftMaster ELITE replacement electronic box assembly\u003c\/li\u003e\n\u003cli\u003eUsed on select ELITE swing and slide gate operator systems (verify by model and parts diagram)\u003c\/li\u003e\n\u003cli\u003eCommon alternate reference: Q402 (model dependent)\u003c\/li\u003e\n\u003cli\u003eDesigned as a direct replacement to restore a proper electronics mounting and service enclosure\u003c\/li\u003e\n\u003cli\u003eHelps protect internal operator electronics from exposure and tampering when the original box is compromised\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e K74-50278\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso Known As:\u003c\/strong\u003e Elite Q403, Q402\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Electronic box assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperator Compatibility:\u003c\/strong\u003e ELITE SL3000, ELITE CSW200 (model dependent, verify by parts diagram)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthenticity:\u003c\/strong\u003e Genuine LiftMaster replacement part\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConclusion\u003c\/h3\u003e\n\u003cp\u003eIf your ELITE operator needs a replacement electronic box assembly due to damage or wear, the LiftMaster K74-50278 (Elite Q403) is the correct OEM part to restore the operator’s electronics enclosure and serviceability. Confirm compatibility by referencing the correct manual or parts breakdown for your specific operator configuration.\u003c\/p\u003e","brand":"LiftMaster","offers":[{"title":"Default Title","offer_id":20432052617270,"sku":"K74-50278","price":334.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0141\/9617\/8998\/products\/q403.jpg?v=1753914994","url":"https:\/\/theelitegateoffers.com\/products\/liftmaster-k74-50278-elite-q403-electronic-box-assembly","provider":"Elite Gates","version":"1.0","type":"link"}