2017 Ford Expedition · symptom sheet
Brake pedal goes hard or the booster or vacuum pump fails
- 32owner reports
- 75,000median miles
- 0involved a crash
Newest report Aug 28, 2025 · checked Sep 29, 2026
32 of the 75 reports of brake wear on the 2017 Expedition describe brake booster failure.
Part of Brakes grind, pulse or wear early (75 reports) · also: brake light on, soft brake pedal
Tick what matches of 32 reports
Brake booster failure on other Expedition years
No other Expedition model year has enough reports of brake booster failure for a sheet of its own. See every Expedition year.
What this problem usually is
This is the narrower sheet inside brakes for reports about a hard pedal or a failed power assist. The pedal stops feeling normal: it turns stiff, takes far more force, and the car needs a longer distance to stop.
What got replaced
Owners who name the part that was replaced mention the brake booster (29 reports) and the master cylinder (24 reports).
Recalls and investigations
2 recalls on the brakes cover the 2017 model year. A recall on the same system isn't always the same failure, so read the defect text.
The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.
The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.
All 4 recalls on the 2017 Ford Expedition, with the owner complaints on each recalled system
When it happens
The middle half of failures fell between 65,744 and 105,000 miles, from the 16 reports that gave a mileage.
What owners wrote
“brake master cylinder fluid leaked into the brake booster causing complete brake failure.”
Filed Aug 18, 2025
“Loss of power brake assist. Warnings appear peddle get hard still have braking. Can leave car sit not running or still be driving and system resets self. Still have fluid in master cylinder. This has happened twice.”
Filed Feb 5, 2022
“Brake master cylinder failed causing brake fluid in the brake booster and little to no breaking at freeway speeds. There is a current recall on same model year F150 with the same 3.5L eco boost engine manufactured out of the same plant as our expedition. Took off the master cylinder and the brake booster was filled with brake fluid. SUV has aprox 67k miles.”
Filed Aug 11, 2021 · 67,000 miles
“Breakfast fluid leaking, brake fluid light on. Found brake master cylinder leaking inside of brake booster.”
Filed Jul 20, 2021
Should you keep driving it?
This page can't tell you that. 0 of 32 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Infotainment, screen or backup camera fails 62 reports
- Engine stalls or loses power while driving 35 reports