Brake Foundation Components problems of the 2003 Jeep Laredo

Dt: the contact owns a 2003 Jeep grand cherokee Laredo. The brake system in his vehicle was making an extended stopping distance on any looseness of pavement will cause this to occur making the vehicle to pulsate. The brakes system was replaced (rotors, calipers, everything) at 17,000 miles and now after another 17,000 the brakes system is needing to be replaced again. The first time was on warranty but now they have to replace it themselves. The problem gradually got worse. His daughter has the same type of vehicle and they are having the same type of problem with that vehicle as well.