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.Google+
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: 205,500 mi (103,000 mi - 350,000 mi)
Visitor, 1994 Geo Prizm, 177,000 mi
ENGINE VIBRATION CURED BY NEW MOTOR MOUNT
Been told since about 2005 that one motor mount on my 1994 Geo Prism is cracked. Then another, I believe.
Have had 3 different service shops (in different states) tell me about the crack(s). But it seems to run ok, so I save
the money and keep running it.
Had about 200000 miles when I was first told around 2005 or so. Have 257000 now, in Sept. 2014. Keep driving it, as it is a "backup" car mainly now, and used only for local slow speed driving.
Visitor, 1995 Geo Prizm, 1.6L 4 Cylinder, 103,000 mi