Fiat Chrysler is recalling 2,185 trailer light modules sold as accessories for commercial vans because the brake lights may not work.
The recall covers certain modules sold for the 2014 through 2016 Promaster and 2015 to 2016 Promaster City.
The company says some modules have a software error that can prevent trailer brake lights from illuminating when the driver steps on the pedal. A lack of brake lights can increase the risk of a crash.
Fiat Chrysler says it made more than 84,000 of the modules, but only 2,185 have the software problem.
Dealers will replace the modules at no cost to owners. Fiat Chrysler has not yet come up with a schedule for the repairs but says owners will be notified by mail.