Dorman 926-539 Power Brake Booster Check Valve

Power Brake Booster Check Valve for OE Fit

This Dorman power brake booster check valve is built to match the original valve’s fit and function on selected Ford and Lincoln trucks and SUVs. It is a direct replacement for applications such as the Ford F-150, Ford Expedition, and Lincoln Navigator, with OE-style routing and a 45-degree outlet angle for proper hose alignment.

Part number 926-539 is engineered for durable, reliable brake booster vacuum control and is made from black plastic with a 0.44 in valve opening size. If you are replacing a worn or leaking brake booster check valve on a 2011-2014 Ford F-150 or a 2015-2017 Ford Expedition / Lincoln Navigator, this part number 926-539 is a direct-fit service part to verify against your original component.

Key Features

• Direct replacement power brake booster check valve for OE-style fit and function
• Black plastic construction for everyday underhood use
• 45-degree fitting outlet angle for cleaner hose routing
• 0.44 in valve opening size
• Grommet end outside diameter: 0.64 in
• Hose end outside diameter: 0.42 in
• Compatible with 2011-2014 Ford F-150, 2015-2017 Ford Expedition, and 2015-2017 Lincoln Navigator

Detailed Description

Dorman 926-539 is a power brake booster check valve designed for vehicles that use vacuum-assisted braking. It helps maintain the one-way flow needed by the brake booster, supporting consistent pedal feel and proper booster operation. The compact plastic body, black finish, and OE-matched dimensions make it a practical replacement when the original valve is cracked, leaking, or no longer sealing correctly. This part cross-references OE numbers BL3Z2365A and DL3Z2365A for the same application.

For fitment-based searches, this part is a direct replacement for a Ford F-150 brake booster check valve, a Ford Expedition brake booster check valve, and a Lincoln Navigator brake booster check valve. Part number 926-539 is also a useful reference when comparing the original valve’s outlet angle, hose size, and grommet diameter before installation.

Common Problems This Part Can Address

• Hard brake pedal caused by loss of booster vacuum retention
• Vacuum leak at the brake booster check valve connection
• Cracked or brittle plastic valve body
• Poor hose fit from a worn or incorrect outlet angle
• Brake booster performance issues related to a failed one-way valve

Installation Notes and Tips

Confirm the original valve’s dimensions, hose connection size, and 45-degree outlet angle before installation. Inspect the booster grommet and vacuum hose for wear, since damaged mating parts can affect sealing even when the replacement valve is correct. Verify vehicle application by year, make, and model before ordering, especially on 2011-2014 Ford F-150 and 2015-2017 Ford Expedition / Lincoln Navigator applications.

Quality Assurance

Dorman designs this replacement valve to match the original part’s fit and function on specified vehicles, with an emphasis on durability and reliable performance. Part number 926-539 is built as an OE-style service replacement for brake booster vacuum control on the listed Ford and Lincoln applications.