The largest of two recalls announced Wednesday covers almost 382,000 Ram 2500 and 3500 pickups and Ram 4500 and 5500 chassis cabs from 2010 through 2014.
In trucks with 6.7-Liter Cummins diesel engines, corrosion on a fuel heater terminal could cause overheating, fuel leaks and fires.
The second recall covers more than 184,000 Jeep Grand Cherokee and Dodge Durango SUVs from 2014. A debris cover over a circuit board in the steering column control module can disrupt communications and disable the stability control. The problem was discovered when dealers started getting reports from customers that electronic stability control warning lights were coming on.
Fiat Chrysler has issued 33 global recalls and 27 in the U.S. so far this year. Doug Betts, its longtime quality chief, left the company to pursue other options after Consumer Reports' survey-based rankings this year showed four Fiat Chrysler brands at the bottom of its list. Dodge, Ram, Jeep and Fiat performed worst of 28 brands ranked by the magazine.