The trucks affected by the recall are fitted with a defective water pump.

Fiat-Chrysler Automobiles' Ram division has issued a voluntary product recall which affects nearly half a million trucks registered in the United States.

443,712 examples of the 2500, 3500, 4500, and 5500 pickups are potentially fitted with a defective water pump. The recall only applies to trucks equipped with the 6.7-liter engine.

Ram explains the bearing in the water pump could overheat and, in extreme cases, cause a fire under the hood. Ram stresses it's not aware of any accidents or injuries tied to the defect, and it points out it has stopped using the defective water pump.

The water pump issue will trigger a warning light in the instrument cluster, according to FCA. The automaker is urging Ram truck owners to stop by their nearest dealer if a light begins appearing to ensure it's not indicating an imminent water pump failure.

The recall extends beyond the United States. About 46,000 trucks registered in Canada are equipped with a faulty water pump, along with roughly 4,500 trucks registered outside of the NAFTA region.

Owners of affected vehicles will be notified when the parts are available. Ram hasn't revealed when it will receiver the replacement parts