{"product_id":"dorman-4wd-actuator-vacuum-check-valve-926-390-for-ford-lincoln-2015-2018-direct-fit-one-way-vacuum-seal","title":"Dorman 4WD Actuator Vacuum Check Valve 926-390 for Ford\/Lincoln 2015-2018 — Direct-Fit, One-Way Vacuum Seal","description":"\u003cp\u003e\u003cstrong\u003eThe Dorman 926-390 4WD actuator vacuum check valve is a direct-fit replacement designed to restore correct vacuum control for compatible Ford and Lincoln four-wheel-drive systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement vacuum check valve is built to match the original component’s fit and function so your 4WD vacuum circuit can maintain the pressure needed for actuator operation. Engineered from durable materials and backed by Dorman’s long automotive experience, the 926-390 is intended as a straightforward fix when the factory valve fails or leaks. Before ordering, confirm the exact fit for your vehicle using your make, model and trim in the garage tool.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this valve restore proper 4WD vacuum performance?\u003c\/h3\u003e\n\u003cp\u003eThe check valve prevents vacuum loss by allowing one-way flow and sealing against backflow when the system is not under vacuum. Replacing a worn or cracked valve helps the actuator receive stable vacuum pressure so the 4WD engagement parts can operate more consistently.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-way vacuum control to prevent unintended pressure loss.\u003c\/li\u003e\n  \u003cli\u003ePrecisely molded ports to match OEM routing and tubing connectors.\u003c\/li\u003e\n  \u003cli\u003eSeals tightly to reduce leaks that cause actuator hesitation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles is the Dorman 926-390 compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis part is produced for specific Ford and Lincoln model years that used the same vacuum check valve design. Compatibility is model- and trim-dependent, so verify with your vehicle information before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFord F-150 — model years 2015, 2016, 2017 and 2018.\u003c\/li\u003e\n  \u003cli\u003eFord Expedition — 2018 model year support.\u003c\/li\u003e\n  \u003cli\u003eLincoln Navigator — compatible with 2018 vehicles using the same valve layout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the practical benefits of choosing this Dorman replacement?\u003c\/h3\u003e\n\u003cp\u003eInstalling the 926-390 can eliminate vacuum leaks, improve actuator response, and reduce 4WD engagement issues caused by a failed check valve. It’s manufactured to match original dimensions so installation is typically straightforward.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect replacement design for easy installation without modification.\u003c\/li\u003e\n  \u003cli\u003eDurable material construction for longer service life under engine-bay conditions.\u003c\/li\u003e\n  \u003cli\u003eBacked by Dorman’s product support and decades of aftermarket experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install the check valve myself, and what should I check during installation?\u003c\/h3\u003e\n\u003cp\u003eMany owners and technicians can replace this valve with basic hand tools and careful hose removal. Ensure vacuum lines are routed the same way, inspect hoses for cracks, and test the 4WD engagement after installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse pliers to release hose clamps and replace only the damaged valve first.\u003c\/li\u003e\n  \u003cli\u003eConfirm the arrow or flow direction on the valve matches original orientation.\u003c\/li\u003e\n  \u003cli\u003eCheck connected hoses and actuators for wear to prevent repeat failure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Dorman 926-390 is intended for owners and mechanics working on Ford F-150 (2015–2018), Ford Expedition (2018) and Lincoln Navigator (2018) vehicles who need a reliable, OEM-style replacement vacuum check valve. It’s a practical option for anyone troubleshooting intermittent 4WD engagement, vacuum leaks in the actuator circuit, or replacing a visibly damaged valve. Make sure to confirm fitment with your exact trim and vehicle year before ordering to ensure proper compatibility.\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: Does the Dorman 926-390 fit my F-150?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This part fits Ford F-150 model years 2015–2018 when the vehicle uses the same vacuum check valve design. Confirm fit with your exact trim in the garage tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I tell if the check valve needs replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Look for vacuum leaks, poor 4WD engagement, or visible cracks in the valve or hoses. Test and replace if the valve fails to hold vacuum.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":48085371355294,"sku":"B09S2XBVPD","price":37.1,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dorman-926-390-front-view.jpg?v=1785870374","url":"https:\/\/northtrailauto.ca\/products\/dorman-4wd-actuator-vacuum-check-valve-926-390-for-ford-lincoln-2015-2018-direct-fit-one-way-vacuum-seal","provider":"North Trail Auto","version":"1.0","type":"link"}