4277-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U
■Coolant selection
Only  use  “Toyota Super  Long  Life Coolant”  or a  similar  high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-bora te coolant with
long-life hybrid organic acid technology.
U.S.A.: 
“Toyota  Super  Long  Life  Coolant”  is  a  mixture  of  50%  coolant  an d  50%
deionized water. (Minimum temperature: -31 F [-35 C])
Canada: 
“Toyota  Super  Long  Life  Coolant”  is  a  mixture  of  55%  coolant  an d  45%
deionized water. (Minimum temperature: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually  check  the  radiators,  hoses,  engine/power  control  unit  coolant  reser-
voir caps, drain cock and water pump. 
If you cannot find a leak, have your Toyota dealer test the cap  and check for
leaks in the cooling systems.
WARNING
■ When the hybrid system is hot
Do not remove the engine coolant radiator cap and power control  unit cool-
ant reservoir cap. 
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight antifreeze. The cor rect mixture of
water  and  antifreeze  must  be  used  to  provide  proper  lubrication ,  corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging p arts or paint. 
4307-3. Do-it-yourself maintenance
PRIUS c_U
If  the  amount  of  washer  fluid  is
insufficient, add washer fluid.
Washer fluid
WARNING
■When adding washer fluid
Add  washer  fluid  after  the  hybrid  system  has  been  stopped  and  c ooled
down sufficiently. Washer fluid contains alcohol and may catch  fire if spilled
inside a hot engine compartment.
NOTICE
■ Do not use any fluid ot her than washer fluid 
Do not use soapy water or engine antifreeze instead of washer f luid. 
Doing so may cause streaking on the vehicle's painted surfaces,  as well as
damaging the pump leading to problems of the washer fluid not s praying.
■ Diluting washer fluid
Dilute washer fluid with water as necessary. 
Refer to the freezing temperatures listed on the label of the washer fluid bot-
tle.