There are two sensors. Actually, I think one is referred to as a sensor and one as a sender. The sensor (ECT) sends a signal to the computer, to control various engine/fan functions. The sender sends a signal to the temperature gauge. Both the sensor and the sender are located near the thermostat. The ECT is just above the thermostat, and the sender is just below. They will cost around $15 each, give or take a little.

95 Contour Zetec, ATX (wrecked, sitting in the barn) 95 Mystique Zetec, MTX 2000 Taurus SEL 3.0L Duratec 1994 Crown Victoria LX 4.6 V8 1993 Chevy Silverado 4.3 V6