Does your MR2 run rough or inconsistent? This is one of the main culprits that no one ever replaces. Do yourself and your car a favor and replace this inexpensive part and your car will run much better. It is largely responsible for fuel trims. This is the coolant temperature sensor that the ECU reads. Fits a Gen2 1991-1995 or Gen3 1995-1999 3SGTE. This is not the the sensor for the temperature gauge on the instrument cluster.