Engine Coolant Thermostat Fit For Chevrolet Spark 1.2L L4 OEM NO. : 25199831 Optimal Thermal Regulation:Engineered to control cooling capacity, maintaining the engine within the ideal temperature range. Maintains optimal engine temperature that supports proper oil viscosity, reducing internal friction and extending engine component life. Engineered for precise calibration, it opens at the exact temperature specified, ensuring compatibility with engine management systems for peak performance.