Why is my Audi A4's coolant leaking?

I have noticed that my Audi A4's coolant level keeps going down, and I have to refill it frequently. What could be causing this issue and how can I fix it?

One possible reason for coolant leaking is a damaged radiator. I suggest taking your car to a mechanic to check for any cracks or leaks in the radiator.

Another common cause is a malfunctioning water pump. Have a professional inspect your car and replace the water pump if necessary.