Car went in to the dealership again....

For the 4th time in 5 weeks the car went back to the dealership. First it was because the MAS sensor died and i needed new rotors, a week later the indicator said "Low Batt. Charge" so the dealership installed a new alternator in, a few days later the indicator lit up again and its the same problem so they put in another alternator for free, and a week later which is today the same problem occured agian!!! What is happening to the car??? We might as well sell the car and get a Lexus or something...

Does anybody here know what's happening? thanks!