07:46 AM EDT, 07/07/2025 (MT Newswires) -- Stellantis ( STLA ) trucks' brake transmission shift interlock system is subject to further investigation despite previous recalls of certain models of 2013 to 2018 RAM vehicles, the National Highway Traffic Safety Administration said.

The regulator's Office of Defects Investigation opened an investigation Thursday after receiving 14 questionnaire reports and 6 death and injury reports describing post-recall remedy failures in vehicle models that include about 1.2 million RAM 1500, 2500, 3500, 4500, and 5500 trucks equipped with a column mounted shift lever.

The alleged failures of the braking system were repaired under two previous recalls which sought to address a potential condition which can cause the locking pin to become stuck, allowing possible vehicle rollaways when the transmission shifts from park without depressing the brake pedal or without a key in the ignition, the agency said.

The regulator said it opened query to review the effectiveness of the recalls.