general problems of the 2007 Ford Taurus

The contact owns a 2007 Ford Taurus. After 4,000 miles, the front tires were worn. The dealer replaced the tires for free. At approximately 12,000 miles, the rear tires began to wear out. The dealer no longer covered the tires and the contact had them replaced at wal mart. At 60,000 miles, all four tires needed to be replaced again. He believes that the tires are not the issue, but rather the failure lies within the vehicle itself. He took the vehicle to the dealer and was informed that nothing was wrong. He believes that his vehicle is a lemon. The failure mileage was 4,000 and current mileage was 64,000.