If the car has the 3.1L v-6 engine, a very common problem with the engines are the intake gasket leaking and it could cost in the area of $300 to $600 to fix depending on where you go. If has already been replaced though, it should last a very long time if it was replaced with the new and improved type of gasket. I work on these types of cars everyday for the past 3 years and they are very good reliable cars. If you take care of it, it will take care of you...like any car.