MK1 1989 > 1998. Rear Water Temperature Sensor, Mk1. Mk1 1989>1998. Fits all 1.6 Mk1 models, 1989>1998. MK2 1998 > 2005. Genuine Mazda water temperature sensor. This is the second sensor located on the back of the cylinder head which sends it's signal to the ECU.
