Tailgate Latch problems of the 1999 Jeep Grand Cherokee

One of the two rear liftgate pistons which are designed to hold up the weight of the liftgate snapped violently when opening the hatch. This piston shot up and wedged inside the crease bewteen the liftgate and body of the vehicle. Because it became wedged in this crease, thankfully the liftgate did not fall hard therefore did not injure anyone. The car body is dented from the impact. The part replacement cost approximately $70. Jeep would not pay for the replacement part even though they admitted it was not something that should fail. Pistons holding up the vehicle hood also are faulty, as are the pistons that hold up the pop-up window glass. None of these pistons can reliabilbly hold the weight of the items they were designed for.