DO-IT-YOURSELF MAINTENANCE Engine and Chassis -> Checking the coolant level for Your Toyota Prius 4 Door Second Generation (2004-2009)

Checking the coolant level  
CAUTION  
The coolant heat storage tank reaches  
high temperature inside. It is danger-  
ous if hot coolant is discharged when  
replacing. For replacement of the  
coolant, contact your Toyota dealer.  
Look at the see−through coolant reser-  
voir when the hybrid system is cold.  
The coolant level is satisfactory if it is  
between the “FULL” and “LOW” lines  
on the reservoir. If the level is low, add  
the coolant. (For the coolant type, see  
“Coolant type selection” described be-  
low.)  
Oil identification mark  
To ensure excellent lubrication perfor-  
mance for your engine, “Toyota Genuine  
Motor Oil” is available, which has been  
specifically tested and approved for all  
Toyota engines.  
Please contact your Toyota dealer for fur-  
ther details about “Toyota Genuine Motor  
Oil”.  
The ILSAC (International Lubricant Stan-  
dardization and Approval Committee) Certi-  
fication Mark is added to some oil con-  
tainers to help you select the oil you  
should use.  
The coolant level in the reservoir will vary  
with hybrid system temperature. However,  
if the level is on or below the “LOW” line,  
add coolant. Bring the level up to the  
“FULL” line.  
If the coolant level drops within a short  
time after replenishing, there may be a  
leak in the system. Visually check the  
radiator, hoses, radiator cap and drain  
cock and water pump.  
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If you can find no leak, have your Toyota  
dealer test the cap pressure and check  
for leaks in the cooling system.  
For Canada—“Toyota Super Long Life  
Coolant” is a mixture of 55% coolant and  
45% deionized water. This coolant pro-  
vides protection down to about 42C  
(44F).  
CAUTION  
NOTICE  
To prevent burning yourself, do not  
remove the radiator cap when the en-  
gine is hot.  
Do not use plain water alone.  
Coolant type selection  
Use of improper coolants may damage  
your cooling system.  
Toyota recommends “Toyota Super Long  
Life Coolant”, which has been tested to  
ensure that it will not cause corrosion nor  
result in malfunction of your coolant sys-  
tem with proper usage. “Toyota Super  
Long Life Coolant” is formulated with  
longlife hybrid organic acid technology  
and has been specifically designed to  
avoid cooling system malfunction on  
Toyota vehicles.  
Only use “Toyota Super Long Life Coolant”  
or similar high quality ethylene glycol  
based nonsilicate, nonamine, nonnitrite,  
and nonborate coolant with longlife  
hybrid organic acid technology. (Coolant  
with  
longlife  
hybrid  
organic  
acid  
technology is  
a
combination of low  
phosphates and organic acids.)  
For the U.S.A.—“Toyota Super Long Life  
Coolant” is a mixture of 50% coolant and  
50% deionized water. This coolant pro-  
vides protection down to about 35C  
(31F).  
Please contact your Toyota dealer for fur-  
ther details.  
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