DETROIT -- U.S. safety regulators are investigating complaints of braking problems with Dodge Dart compact cars.
The probe by the National Highway Traffic Safety Administration covers about 121,000 Darts made by Fiat Chrysler from the 2013 model year.
The agency says it has 18 complaints that brake pedals can be hard to depress and braking distance unexpectedly increased.
Some said they had to use the parking brake to stop the cars, while others reported that the brake master cylinder had to be replaced.
The agency has no reports of crashes or injuries. An investigation could lead to a recall.
Chrysler says it's cooperating with the investigation and that owners with concerns should contact dealers.
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US investigates brake problems in 2013 Dodge Dart compacts