More than 1.8 million Ram trucks could unexpectedly roll away under certain circumstances and will be recalled, according to Fiat Chrysler Automobiles.
The problem affects vehicles with gear shifters mounted to the steering column, the automaker said. Those with electronic dial shifters or floor-mounted shifters are not included.
The automaker will recall 2009-17 model year Ram 1500 light duty trucks and 2010-17 Ram 2500 and 3500 heavy duty trucks. The 2011-17 Ram 3500, 4500 and 5500 chassis cabs are also part of the recall.
Heavy duty trucks account for the majority of affected vehicles, FCA said. There are 1.5 million recalled vehicles in the U.S. Nearly 250,000 are in Canada, more than 42,000 are in Mexico and about 15,000 are in countries outside of North America.
In affected vehicles, the Brake Transmission Shift Interlock, or BTSI, may become disabled if subjected to high-temperature conditions for long periods of time, FCA said. If the BTSI is not functioning, the Ram could shift out of park inadvertently and begin to move.
Seven injuries and a small number of crashes could be related to the problem, the automaker said.
FCA will inspect potentially affected vehicles and issue a fix. The automaker is encouraging truck owners with questions to call (866) 220-6747.
“FCA US will restore BTSI function in the vehicles subject to this recall,” said Tom McCarthy, head of safety compliance and product analysis. “Nevertheless, as always, we urge customers to use their parking brakes, as recommended, and to ensure that child occupants are not left unattended.”
Ram trucks have had a series of large recalls this year.
In September, FCA recalled more than 500,000 Ram pickups and heavy-duty trucks for a water pump bearing that could overheat and cause an engine fire.
In May, a software problem caused the recall of 1 million heavy duty Ram pickups. That issue affected how the seat belts and air bags work in a crash and may have led to one fatality.
Ram trucks are among the nation’s best-selling vehicles.
FCA sold 455,000 Ram 1500-3500 pickup trucks through the first 11 months of 2017, an increase of 3.2 percent compared to the same period last year, according to industry research firm Autodata Corp.
That makes Ram pickups the third best-selling vehicle in the country. Only the Chevrolet Silverado and Ford F-Series have sold more this year.
FCA is preparing to launch the next-generation version of the light duty Ram 1500 pickup at the 2018 Detroit auto show in January. The truck will feature an all-new design and modernized interior with a large vertical touchscreen. Heavy duty versions will soon follow.