If your Polaris Xplorer or Xpress cooling fan isn't working right, this thermal switch is probably what you need! It's a direct replacement for Polaris part numbers 4110225, 4010202, and 4010256, with the same 185-degree opening temperature setting as the original equipment. The installation is super straightforward - just screw it into the radiator (it's located on top in the center), plug it in, and you're done. They've even included an adapter plug so it works whether your model uses a plug connection or two wires with terminals. This switch controls when your cooling fan turns on, which is crucial for preventing overheating during those tough rides. It fits several Polaris Xplorer models from 1997-2000 including the Xplorer 400 (97-00), Xpress 300/400 (1997), and Xplorer 500 (1997). The quality is spot-on, and it functions exactly like the original part. If you're doing your own ATV maintenance and need to replace a faulty thermal switch, this is the right part at a reasonable price. Your cooling system will be back to working perfectly, keeping your engine at the right temperature during those demanding rides.