Fiat Chrysler said on Friday that it would modify around 100,000 diesel vehicles to try to reach a settlement with United States regulators, as separate academic studies provided mounting evidence that the carmaker had installed software meant to evade emissions standards.

The move came a day after the company said it was in talks to resolve a Justice Department investigation. The case bears striking similarities to a Volkswagen scandal in which several executives have been investigated or charged, with the German carmaker paying tens of billions of dollars in fines, penalties and settlements.

Though Fiat Chrysler is unlikely to have to pay as much as Volkswagen, the emissions cheating, if proved, could still be expensive and badly damage the company’s reputation at a time when it is grappling with low profitability.

On Friday, Fiat Chrysler said it was modifying Jeep Grand Cherokees and Ram 1500 diesel vehicles in the 2014 through 2016 model years with “updated emissions software calibrations.” It said it was also seeking regulatory approval for 2017 models with the same software.