Running the engine without coolant will cause serious engine damage.
If persistent coolant loss is noticed, seek qualified assistance immediately.
The coolant reservoir level should be checked at least weekly. It should be checked more frequently in high mileage or arduous operating conditions. Always check the level when the system is cold.
Make sure the coolant level remains between the MIN and MAX indicator marks on the side of the expansion tank.
If the coolant level drops suddenly, or drops by a large amount, the vehicle must be examined by a retailer/authorized repairer as soon as possible.