The engine mount on the driver 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
Toyota MR2 Engine mount on driver side can wear with high mileage
Toyota MR2 Problem
Engine Affected: 2.0L 4 Cylinder Turbo
Visitor, 1991 Toyota MR2, 2.0L 4 Cylinder Turbo, 65,983 mi
everytime I go past redline the mount always brakes and just replaced 4th mount.