{"product_id":"phoddar-locking-fuel-cap-set-for-freightliner-108sd-2-pack-die-cast-aluminum-keyed-alike","title":"Phoddar Locking Fuel Cap Set for Freightliner 108SD — 2-Pack Die-Cast Aluminium, Keyed-Alike","description":"\u003cstrong\u003ePhoddar 03-37017-002 is a keyed, die-cast aluminum locking fuel cap set designed to replace OEM quarter-turn caps on many Freightliner models and prevent contamination, theft, and leaks.\u003c\/strong\u003e\n\n\u003cp\u003eBuilt to meet or exceed original-equipment specifications, this Phoddar locking diesel fuel cap kit offers a corrosion-resistant aluminum body, nitrile rubber sealing rings, safety chains, and keyed-alike locks. The package includes two caps, four matching keys, four spare gaskets, and retaining chains—intended for vented semi-truck fuel tanks with a 3\" filler tube outer diameter and about a 3.5\" inside cap diameter. It’s engineered for high-temperature relief up to 220°F and designed specifically for diesel applications.\u003c\/p\u003e\n\n\u003ch3\u003eWill this cap fit my Freightliner truck?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers many Freightliner models from the mid-1990s through recent years as a direct OE-style replacement for 1\/4-turn 4-pin push-and-twist caps. Confirm fit by measuring your fuel filler tube outer diameter and the cap seating area before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for a filler tube outer diameter of approximately 3 inches and cap inside diameter near 3.5 inches.\u003c\/li\u003e\n  \u003cli\u003eDirect replacements for Freightliner part numbers including 03-37017-002 and 572.1018, plus equivalents from Velvac and Tectran.\u003c\/li\u003e\n  \u003cli\u003eCompatible models: Cascadia (2008–2018), Columbia (2001–2016), Century (1996–2010), Coronado (2003–2022), M2-112 (2005–2022) and related FL series like 108SD.\u003c\/li\u003e\n  \u003cli\u003eIntended for vented diesel fuel tanks only; caps have no threads and require proper neck dimensions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the Phoddar locking cap protect my fuel system?\u003c\/h3\u003e\n\u003cp\u003eThe cap’s die-cast aluminum housing and high-quality lock cylinder block dust, water, and corrosive elements while the nitrile rubber seal prevents leaks and maintains an airtight closure. The keyed locks deter unauthorized access and fuel theft, and the included safety chain keeps caps attached during service.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-duty aluminum alloy resists corrosion and road damage.\u003c\/li\u003e\n  \u003cli\u003eNitrile gasket creates a leak-proof seal and withstands diesel and temperature exposure.\u003c\/li\u003e\n  \u003cli\u003eKeyed-alike locks (4 matching keys) reduce theft risk and simplify fleet management.\u003c\/li\u003e\n  \u003cli\u003eSafety chain and bail prevent loss when refueling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation straightforward and what should I check during fitment?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a simple remove-and-replace for compatible quarter-turn filler ports, but proper cleaning and inspection of the filler neck are essential for a reliable seal. If you encounter sealing issues, taking photos or a short video of the neck and cap alignment helps troubleshoot fitment with support.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean the fuel port thoroughly before installation to avoid trapped debris.\u003c\/li\u003e\n  \u003cli\u003eUse one rubber gasket per cap; spare gaskets included for future replacement.\u003c\/li\u003e\n  \u003cli\u003eEnsure the fuel tank is the vented type required for 220°F thermal relief.\u003c\/li\u003e\n  \u003cli\u003eContact seller with images\/videos if leaks or fit problems occur for assistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Fleet owners, owner-operators, and maintenance technicians who run Freightliner trucks or compatible models and need a durable, keyed replacement for worn or missing quarter-turn diesel fuel caps. This kit is suited for those wanting OEM-style fit, theft protection, and a corrosion-resistant build—especially for long-haul and heavy-use applications where reliable sealing and quick servicing matter.\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: Can these Phoddar caps replace OEM part 03-37017-002?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This Phoddar kit is a direct replacement for Freightliner 03-37017-002 and related OEM numbers when dimensions match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these caps suitable for gasoline tanks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These caps are specified for diesel applications on vented tanks with 220°F thermal relief only.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Phoddar","offers":[{"title":"Default Title","offer_id":55170243952983,"sku":"B0F9XYVD4B","price":82.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/phoddar-front-packaging-locking-fuel-cap.jpg?v=1790425871","url":"https:\/\/britishgarage.co.uk\/products\/phoddar-locking-fuel-cap-set-for-freightliner-108sd-2-pack-die-cast-aluminum-keyed-alike","provider":"British Garage","version":"1.0","type":"link"}