The cost to fix a coolant leak in your vehicle will depend on where the coolant is leaking from in the car.
The coolant leak could be as simple as a heater hose, radiator hose, water pump or even something more serious such as a leak from the engine block.
If the coolant leak is from a heater hose or radiator hose then it should only cost from $50.00 to $100.00 to have it fixed.
A water pump could cost from $100.00 to $500.00 to replace depending on the make and model of the car or other vehicle
Some water pumps are easy to replace while others are buried underneath a bunch of other stuff that needs to be removed and replaced when replacing the water pump.
If you need to replace the engine because it's cracked then that can cost $2,000.00 to $5,000.00
It all depends on where the coolant leak is coming from as to what it will actually cost to fix.
However most coolant leaks I fix cost the owner of the car between $100.00 to $300.00 when it's something simple.