FCA US announced it was voluntarily recalling an estimated 646,394 US market SUVs to inspect brake booster shields for proper installation.
The shields are designed to protect the boosters from water intrusion. Should water get inside and contribute to corrosion, and/or freeze, brake function may be degraded, the automaker said in a statement, adding it was aware of a single potentially related accident but no injuries.
"A booster compromised by water will still deliver brake function in compliance with US federal safety standards. However, customers may experience excessive brake pedal firmness," FCA added.
"Additionally, a potential booster issue may be preceded by a warning light, and/or activation of the anti-lock braking system."
Affected vehicles are model year 2011-2014 Dodge Durango and Jeep Grand Cherokee SUVs.
The shields were originally installed in conjunction with a 2014 recall involving the same set of vehicles, nearly 95% of which have been serviced. A review of warranty data led to an FCA US investigation that discovered shields on some vehicles had been installed improperly.
Affected owners will be notified with repairs starting early in November.
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No action is required for vehicles with properly installed shields. Those found to have boosters with compromised function and/or improperly installed shields, will be serviced accordingly, free of charge, FCA said.
