FCA said it as aware of a single potentially related accident, the company said on Tuesday.
The shields are designed to protect the boosters from corrosion caused by water exposure. In case a booster is compromised by water it would cause excessive brake-pedal firmness, the company said.
The shields were originally installed in conjunction with a 2014 recall involving the same set of vehicles, nearly 95 percent of which have been serviced, the automaker said.
The affected vehicles are model-year 2011-2014 Dodge Durango and Jeep Grand Cherokee SUVs.
FCA announced a similar recall last week in Canada that covered 42,034 vehicles.