Coolant is extremely crucial to safe operation of your NISSAN. It takes the excess heat from the engine and protects the engine from overheating by cooling the heat with the outside air. It can also act as a rust inhibitor. Hole in the radiator, blown head gasket, failed water pump, leaky radiator cap- can be the cause of coolant leak. With regular aftercare, you can detect the deteriorating hose and avoid overheating. Once you notice the signs, just take your NISSAN to a reputable service center where certified technicians can locate and fix the issue.