Mazda 2008 Mazda3 4-Door Owner's Manual page 259

If you find a leak or other damage, or if
coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
Except L3 turbocharger engine
L3 turbocharger engine
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
8-21).
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.
In Case of an Emergency
Overheating
7-15