This Schaeffler INA kit includes a high-quality water pump and a durable timing belt, designed to work in perfect synchrony. Properly maintaining your engine's timing system is crucial for preventing catastrophic engine damage. This kit provides all the necessary components to replace your worn timing belt and water pump, ensuring your engine runs smoothly and efficiently. The water pump is essential for regulating engine temperature, preventing overheating and potential damage. The timing belt synchronizes the rotation of the crankshaft and camshaft(s), ensuring the engine's valves open and close at the correct times.