Cooling Radiator Thermal Switch Sensor 4010161 for Polaris Sportsman Xplorer Scrambler Keep your Polaris running cool and reliable with this replacement radiator thermal switch sensor. Designed to monitor coolant temperature and engage the cooling system as needed, this part helps prevent overheating and maintains consistent engine performance. Key benefits Prevents overheating: Activates the radiator fan when coolant temperature rises, helping protect the engine and extend component life. Reliable replacement: unit designed to restore proper temperature control when an original thermal switch fails or becomes intermittent. Easy service solution: Compact design and standard electrical connection make this sensor a practical choice during routine maintenance or repairs. What it does (functionality) Senses coolant/radiator temperature and provides a signal to the cooling fan circuit. Helps maintain operating temperature by turning the fan on and off as needed. Compatibility and fit Specifically for Polaris ATVs and UTVs: Sportsman, Xplorer, Scrambler models. Part number: 4010161 — match this number to your vehicle's parts list to confirm fit. Key attributes Condition: replacement part. Role: Radiator thermal switch / temperature sensor for cooling fan control. Design: Compact sensor engineered for radiator mounting and integration with existing wiring harnesses. Performance: Intended to provide consistent temperaturetriggered switching to protect engine cooling performance. Use cases / Applications a failed or intermittent thermal switch causing fans to run continuously or not run at all. Install during routine coolingsystem maintenance to restore original temperature control and prevent overheating on trail rides or work use. Retrofit a vehicle returning from season storage or heavy use to ensure the cooling fan engages reliably under load or hot ambient conditions. Installation notes Verify part number 4010161 against your vehicle parts list before . Installation typically involves locating the radiator mounting port for the thermal switch, removing the old sensor, and installing the replacement, then reconnecting the electrical connector. If unfamiliar with cooling system service, a qualified technician or service manual is recommended. Why choose this part Matches the application listed for Polaris Sportsman, Xplorer, and Scrambler models under part number 4010161. Offers a straightforward way to restore proper cooling fan operation and protect engine performance without replacing larger cooling components. Compatibility reminder Confirm vehicle model and part number 4010161 to ensure compatibility before ordering.