{"product_id":"lisle-12490-line-sockets-17mm-21mm-fuel-line-service-tool","title":"Lisle 12490 Line Sockets 17mm \u0026 21mm - Fuel Line Service Tool","description":"\u003cp\u003eIn this review of the Lisle 12490 line sockets, the bottom line is simple: this pair is for technicians or DIYers who remove fuel fittings and injectors and need a non-damaging, purpose-built solution. The set is designed to replace fuel line fittings without harming the fitting, fuel rail, or fuel line, which reduces the chance of fuel leaks and follow-up repairs. For anyone working on compatible Audi, Volkswagen, BMW, or Paccar engines, the sockets save time and preserve expensive components compared with improvised tools.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-damaging design:\u003c\/strong\u003e Specifically shaped to avoid marring fuel fittings, fuel rails, and lines so the connection surfaces remain reusable after service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo common sizes:\u003c\/strong\u003e Includes a 17mm socket for many Audi, Volkswagen, and BMW high-pressure components and a 21mm socket for Paccar MX engines, covering frequent workshop needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/8' drive compatibility:\u003c\/strong\u003e Use with a standard 3\/8' square drive ratchet or extension for reliable leverage and control during removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced leak risk:\u003c\/strong\u003e By preserving the mating surfaces of fittings and rails, the tool helps minimize the possibility of fuel leaks after reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust build:\u003c\/strong\u003e Customers report solid build quality that stands up to repeated use on fuel system jobs without deforming.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis set is aimed at automotive technicians, mobile mechanics, and experienced DIYers who work on fuel systems of the listed vehicles: Audi A1, A3, A4, A6, A8, Volkswagen Passat, BMW N54\/N63\/S63, and Paccar MX11\/MX13 engines. It suits shops that service high-pressure injector fittings and need a tool that reduces damage-related rework.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include hobbyists who rarely touch fuel systems or anyone needing a broad multi-size universal fuel disconnect kit; this product provides two specific sizes rather than a wide range of adapters. Also, users encountering a mismatched size on older or non-listed models should verify fit before purchase.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eProtects fittings and fuel rails during removal, lowering the chance of post-service leaks.\u003c\/li\u003e\n\u003cli\u003eThe 17mm size fits several common Audi, Volkswagen, and BMW applications, making it practical for modern European vehicles.\u003c\/li\u003e\n\u003cli\u003eCustomers praise the build quality and value for money, noting it simplifies injector removal on high-pressure systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLimited to two sizes so it will not fit every make and model; verify fit for specific applications.\u003c\/li\u003e\n\u003cli\u003eSome users report mixed fit on near sizes, so a precise fit check is advisable before use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct name\u003c\/td\u003e\n\u003ctd\u003eLisle 12490 Line Sockets, 17mm \u0026amp; 21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded sizes\u003c\/td\u003e\n\u003ctd\u003e17mm and 21mm sockets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended engines\u003c\/td\u003e\n\u003ctd\u003eAudi A1\/A3\/A4\/A6\/A8, VW Passat, BMW N54\/N63\/S63, Paccar MX11\/MX13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eUse with 3\/8' square drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary use\u003c\/td\u003e\n\u003ctd\u003eReplace fuel line fittings without damage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCategory\u003c\/td\u003e\n\u003ctd\u003eFuel line disconnect \/ fuel system tool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Lisle 12490 sockets are a focused, practical choice for professionals and DIYers who service the listed European and Paccar engines. They protect fittings and rails, are easy to use with a 3\/8' drive, and represent good value for shoppers who need the specific 17mm and 21mm sizes. Buyers should confirm fit for their application, but for compatible systems this set reduces repair risk and saves time.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill these sockets damage fuel fittings?\u003c\/strong\u003e\u003cbr\u003eThey are designed to avoid damaging fuel fittings, fuel rails, and fuel lines when used correctly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich vehicles do the sockets cover?\u003c\/strong\u003e\u003cbr\u003eThe 17mm fits many Audi A1\/A3\/A4\/A6\/A8, Volkswagen Passat, and BMW N54\/N63\/S63 engines; the 21mm fits Paccar MX11 and MX13 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat drive size is required?\u003c\/strong\u003e\u003cbr\u003eBoth sockets are intended for use with a 3\/8' square drive.\u003c\/p\u003e","brand":"Lisle","offers":[{"title":"Default Title","offer_id":48225562951899,"sku":"B0979FH7M8","price":37.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/612QYSnHd5S._AC_SL1500.jpg?v=1770744395","url":"https:\/\/gearmusthave.com\/products\/lisle-12490-line-sockets-17mm-21mm-fuel-line-service-tool","provider":"GearMustHave","version":"1.0","type":"link"}