Using this Perrin coolant overflow tank is easy. First, make sure your car's engine is cool before you start the installation. Follow the included installation guide to attach the tank using the provided mounting hardware and connect the silicone hose properly. It's important to check for any leaks after installation. During normal use, keep an eye on the coolant level in the tank. If it gets low, add the appropriate coolant. For maintenance, clean the tank regularly with a mild detergent to keep it looking good and functioning well. Remember, the tank has a 5 - year warranty, so if you encounter any problems, contact the manufacturer.