Ford is recalling a touch over 600,000 vehicles in the United States and its territories, due to a hydraulic control unit defect that can impact the brakes.

A recall notice reveals that in affected vehicles, a valve inside the hydraulic control unit (that’s usually closed) may stick open, potentially resulting in extended brake pedal travel and increasing the risk of a crash.

Models impacted are the Ford Fusion, Mercury Milan, and Lincoln MKZ sedans built at Ford’s Hermosillo Assembly Plant in Mexico between February 22, 2006 and July 15, 2009. Ford is aware of 15 reports of accidents and two possible injuries related to the issue.

Another Braking Issue: Ford Fusion, Mercury Milan Investigated Over Potential Braking Failure

To rectify the problem, Ford dealerships will inspect the hydraulic control units of affected vehicles for signs of malfunctioning valves and if necessary, replace them. They will also pressure-flush the system with brake fluid and fit a new reservoir cap.

In total, the recall affects 600,166 vehicles.

This isn’t the only recall issued by Ford in the latter part of the year. In November, it issued three safety recalls across North America for various pickup truck and SUV models over potential fire risks and lighting issues. Earlier this month, Ford and the National Highway Traffic Safety Administration issued the fifth recall this year for the Ranger in North America.

According to the car manufacturer, some Rangers could have misaligned or not properly seated inline electrical connector terminals within the taillights, making them work intermittently or not work at all.