Mazda CX-30 2020 Owner's Manual page 557

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 expert
repairer (we recommend an
Authorised Mazda Repairer).
1. Cooling system cap
2. Cooling fan
3. Coolant reservoir
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required
(page 6-28).
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 expert repairer (we
recommend an Authorised Mazda
Repairer).
If Trouble Arises
Overheating
7-45