The engine mount on the passenger side of the car can wear out on cars with high mileage. This will put extra stress on the other mounts and the faulty mount will need to be replaced.
Car Problem Reports
Geo Prizm Engine Mount on Passenger Side Can Wear With High Mileage
Geo Prizm Problem
Engines Affected: 1.6L 4 Cylinder, 1.8L 4 Cylinder
Average Mileage: 220,000 mi (103,000 mi - 350,000 mi)