Mazda CX-9 2019 Owner's Manual page 588

If Trouble Arises
Overheating
If it is low, look for coolant leaks from
the radiator and hoses.
If you find a leak or other damage, or if
coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
Coolant reservoir
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
6-25).
CAUTION
If the engine continues to overheat or
frequently overheats, have the cooling
system inspected. The engine could be
seriously damaged unless repairs are
made. Consult an Authorized Mazda
Dealer.
7-24
Cooling system cap
Cooling fan