Theoretically, the water that gets inside doesn't affect braking performance even if it freezes in sub-zero temperatures. An inoperative brake booster will take the driver by surprise if unexpected brake force application is required because the brake pedal is much harder to press without the ensemble's aid.
Both Jeep and Dodge dealership service departments will inspect affected vehicles for brake booster corrosion and replace rusty units with all-new ensembles fitted with a shield that protects the crimp joint from water exposure.
Chrysler urges owners affected to contact the manufacturer directly at 1-800-247-9763 and reference recall #P14/NHTSA 14V-154. Another way of finding out if your car is involved in this recall operation is to call your local dealer and provide your VIN (vehicle identification number).