At higher mileages (125,000+) the Engine Coolant Temperature Sensor may intermittently stop working, especially when the vehicle is fully warmed up. This can cause the engine to stall unexpectedly.
Car Problem Reports
Toyota MR2 Engine Stalling When Warm
Toyota MR2 Problem
Engine Affected: 2.0L 4 Cylinder Turbo
Visitor, 1993 Toyota MR2, 2.0L 4 Cylinder Turbo, 130,000 mi
The car would idle at a higher-than-normal rpm. The check engine light would intermittently turn on. The problem was fixed by replacing the engine coolant temperature sensor