{"product_id":"marsram-ignition-coil-pack-fd508-for-ford-f150-expedition-5-4l-v8-straight-black-boot-direct-replacement","title":"Marsram Ignition Coil Pack FD508 for Ford F150\/Expedition 5.4L V8 - Straight Black Boot, Direct Replacement","description":"\u003cp\u003e\u003cstrong\u003eMarsram FD508 ignition coil pack is a direct-replacement coil built to restore proper spark delivery on compatible 5.4L and select 4.6L V8 Ford, Lincoln and Mercury vehicles from the mid‑2000s.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Marsram coil pack is designed to match the OEM footprint and electrical connections for specific Ford 5.4L V8 engines and some 4.6L V8 applications. It replaces commonly used OEM and aftermarket part numbers and comes with a one‑year warranty. Before purchasing, verify the coil’s straight black boot design to ensure compatibility with your vehicle’s V8 ignition harness—this unit does not fit V10 engines or coils with brown or curved boots.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I confirm this coil pack fits my truck?\u003c\/h3\u003e\n\u003cp\u003eCheck the physical appearance and part numbers of your existing coil before ordering. The Marsram FD508 is made for V8 engines with straight black boots; vehicles equipped with brown or curved boots or V10 engines require different coils.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompare plug‑boot shape: straight black boots only.\u003c\/li\u003e\n  \u003cli\u003eMatch replacement numbers: FD508, C1541, C1659, UF537, DG511, and others listed.\u003c\/li\u003e\n  \u003cli\u003eUse vehicle year, make, model and engine size: e.g., 2005–2008 Ford F150 5.4L V8.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat models and years are compatible with this part?\u003c\/h3\u003e\n\u003cp\u003eThe Marsram FD508 covers a range of mid‑2000s vehicles that used the Ford 5.4L V8 ignition layout and certain 4.6L V8 models. It replaces multiple OEM codes, so cross‑referencing helps ensure a correct match.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFord F150 2004–2008 (5.4L V8)\u003c\/li\u003e\n  \u003cli\u003eFord Expedition 2005–2008, Lincoln Navigator 2005–2008 (5.4L V8)\u003c\/li\u003e\n  \u003cli\u003eFord Mustang 2005–2008 and Super Duty F250\/F350 2005–2008 (5.4L V8)\u003c\/li\u003e\n  \u003cli\u003eExplorer 2006–2008 and Mercury Mountaineer 2006–2008 (4.6L V8 compatibility listed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does this coil replace and what warranty is offered?\u003c\/h3\u003e\n\u003cp\u003eMarsram lists multiple interchangeable part numbers for the FD508 to simplify ordering and ensure serviceability across different supplier codes. The part ships with a one‑year limited warranty to cover manufacturing defects under normal use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCross references include FD508, C1541, C1659, UF537, DG511 and more.\u003c\/li\u003e\n  \u003cli\u003eOne‑year warranty against manufacturing defects.\u003c\/li\u003e\n  \u003cli\u003eTested to meet electrical and fitment expectations for direct replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I inspect and install a replacement coil pack?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows basic coil replacement steps: remove battery negative, unplug the coil electrical connector, unbolt the coil, and swap in the Marsram unit. Ensure the new coil’s boot orientation and connector match the original before tightening and reconnecting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDisconnect battery negative terminal first for safety.\u003c\/li\u003e\n  \u003cli\u003eVerify straight black boot and connector pin alignment before installation.\u003c\/li\u003e\n  \u003cli\u003eTorque mounting bolts to manufacturer specs and reconnect harness securely.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Technicians and DIY owners who need a reliable, direct‑fit ignition coil for mid‑2000s Ford, Lincoln or Mercury V8 engines will find the Marsram FD508 an appropriate replacement when the original coil shows misfire symptoms or electrical failure. It’s intended for vehicles that match the listed applications and for buyers who confirm boot color and shape to avoid ordering the incorrect coil for V10 or non‑compatible setups.\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: Will this coil fit my 2005 Ford F150 5.4L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes if your 2005 F150 has the 5.4L V8 and straight black boots; verify boot shape and match part numbers before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the Marsram FD508 compatible with V10 engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The FD508 is only for specified V8 engines and is not compatible with V10 or coils with brown\/curved boots.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Marsram","offers":[{"title":"Default Title","offer_id":55169331757399,"sku":"B09W2D71DZ","price":74.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/marsram-fd508-front-view.jpg?v=1790422531","url":"https:\/\/britishgarage.co.uk\/products\/marsram-ignition-coil-pack-fd508-for-ford-f150-expedition-5-4l-v8-straight-black-boot-direct-replacement","provider":"British Garage","version":"1.0","type":"link"}