Ford is recalling 452,000 Fusion and Mercury Milan vehicles in North America, including 33,600 in Canada because of potentially leaky gas tanks.

The recall covers 2010 to 2011 models of the mid-sized cars built in Ford's Hermosillo Assembly Plant in Mexico.

The vehicles have a canister purge valve that might not work properly, which can eventually cause a leak in the fuel tank. A fuel leak in the presence of an ignition source can lead to a fire.

Ford said it was unaware of any accidents or fires related to the defect.

Its recall notice says dealers will inspect the valve and fuel tanks and do any needed repairs for free.

It also issued a safety recall for 2016 F-650 vehicles because of a park mechanism that could fracture, causing the vehicle to roll.

It said no Canadian vehicles are affected, but 13 of the trucks were sold in the U.S.