Two problems related to brake master cylinder have been reported for the 1999 Chrysler Town & Country. The most recently reported issues are listed below.
I had to have the tank on master cylinder replaced due to seeping of brake fluid. No obvious source of the leak was determined. It seemed to be coming from around the rubber seals where the tank attaches to the master cylinder. The first warning of the leak was the brake warning light. Upon checking the fluid it was discovered to be very low. It was refilled to the proper level. The tank area was well cleaned and dried. Within hours the tank was again wet with fluid. The level gradually decreased over the next several days as the fluid seeped out. No brake failure was observed, on loss of fluid from the tank. I had a local mechanic purchase a new tank from a dealer and put it on the car. New rubber seals were provided with the tank. Time will tell if this has fixed the problem.
Master cylinder leaked into the power brake booster which caused my entire brake system to fail. If the vehicle had been moving at the time of failure, it could have caused many fatalities. The dealer fixed it at no cost, however, I believe that this component should be investigated. The dealer was not concerned that this could have caused many fatalities.