95 Impreza L help

My temp gauge (water) isn't working:crying: and I bought a new sensor and the gauge still doesn't work. I then attempted to just buy and install an aftermarket gauge but it won't fit, is there anything I'm missing to fix the original gauge or any tips on an aftermarket one.

Thanks a bunch.

Does your vehicle have a three wires sensor @ the rear of the coolant crossover tube? Most older Subaru's run two coolant temp sensors. One is a two wire for the ECM, and the other is a single wire for the gauge cluster. Sensor will be closer to the center of the coolant cross over tube. Good luck