cooling TOYOTA PRIUS 2021 Warranties & Maintenance Guides (in English)

39Maintenance Log
MAINTENANCE LOG
MAINTENANCE
15,000 miles or 18 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
NOTE: If 0W-16 oil WAS NOT used at the last oil change, replace engine oil and oil filter.2
Inspect the following: _Ball joints and dust covers _ Exhaust pipes and mountings
_Brake lines and hoses _ Radiator, condenser and/or intercooler
_Cabin air filter _ Steering gear
_Drive shaft boots _ Steering linkage and boots _ Engine/Inverter coolant4




Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:
■Inspect engine air filter
■������� ������ ��� ��� ��� �������
■������� ���� ��� ����� �� ������� ��� ����
Driving while towing, using a car-top carrier, or heavy vehicle loading:6
■Replace engine oil and oil filter2
■������� ���� ��� ����� �� ������� ��� ����
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
■Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or door-to-door delivery use:
■Replace engine oil and oil filter2

Dealer Service verification:
Date: Mileage:
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated.4 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
NOTE: Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may shorten the life of the cabin air filter. Replacement may be needed if you notice reduced airflow from the air conditioner and heater or if the windows fog easily when you use the Fresh mode. Consult your dealer if any of these conditions occur.
■��������� ����� ����� ��� �����
■������ �����
■ �������� ������� ����� �������� ����� ��� ����� ����������
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 39126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 396/3/20 6:09 PM6/3/20 6:09 PM

41Maintenance Log
MAINTENANCE LOG
MAINTENANCE
30,000 miles or 36 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
■������� ����� ��� ������
■������� ������ ��� ������
■������� ������ ��� ��� ��� �������
■��������� ����� ����� ��� �����
■������ �����
Inspect the following: _ Automatic transmission for signs of leakage
_Ball joints and dust covers
_Brake lines and hoses
_ Brake linings/drums and brake pads/discs4
_Drive shaft boots
_Engine/Inverter coolant5
_Exhaust pipes and mountings
_Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Tighten nuts and bolts on chassis and body



_ Fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses
_Fuel tank cap gasket
_Radiator, condenser and/or intercooler
_Rear differential oil (AWD)
_Steering gear
_Steering linkage and boots
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated. 4 Inspect thickness measurement and disc runout.5 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Dealer Service verification:
Date: Mileage:
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 41126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 416/3/20 6:09 PM6/3/20 6:09 PM

43Maintenance Log
MAINTENANCE LOG
MAINTENANCE
45,000 miles or 54 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
NOTE: If 0 W -16 oil WAS NOT used at the last oil change, replace engine oil and oil filter.2
Inspect the following: _Ball joints and dust covers _ Exhaust pipes and mountings
_Brake lines and hoses _ Radiator, condenser and/or intercooler
_Cabin air filter _ Steering gear
_Drive shaft boots _ Steering linkage and boots
_Engine/Inverter coolant4

Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect engine air filter
■������� ������ ��� ��� ��� �������
■������� ���� ��� ����� �� ������� ��� ����
Driving while towing, using a car-top carrier, or heavy vehicle loading:6
■Replace engine oil and oil filter2
■������� ���� ��� ����� �� ������� ��� ����
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
■Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or door-to-door delivery use:
■Replace engine oil and oil filter2
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated. 4 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Dealer Service verification:
Date:Mileage:
NOTE: Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may shorten the life of the cabin air filter. Replacement may be needed if you notice reduced airflow from the air conditioner and heater or if the windows fog easily when you use the Fresh mode. Consult your dealer if any of these conditions occur.
■��������� ����� ����� ��� �����
■������ �����
■ �������� ������� ����� �������� ����� ��� ����� ����������
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 43126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 436/3/20 6:09 PM6/3/20 6:09 PM

47Maintenance Log
75,000 miles or 90 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
NOTE: If 0W-16 oil WAS NOT used at the last oil change, replace engine oil and oil filter.2
Inspect the following: _Ball joints and dust covers _ Exhaust pipes and mountings
_Brake lines and hoses _ Radiator, condenser and/or intercooler _Cabin air filter _ Steering gear _Drive shaft boots _ Steering linkage and boots _Engine/Inverter coolant4




Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect engine air filter
■������� ������ ��� ��� ��� �������
■������� ���� ��� ����� �� ������� ��� ����
Driving while towing, using a car-top carrier, or heavy vehicle loading:6
■Replace engine oil and oil filter2
■������� ���� ��� ����� �� ������� ��� ����
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
■Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or door-to-door delivery use:
■Replace engine oil and oil filter2
NOTE: Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may shorten the life of the cabin air filter. Replacement may be needed if you notice reduced airflow from the air conditioner and heater or if the windows fog easily when you use the Fresh mode. Consult your dealer if any of these conditions occur.
MAINTENANCE LOG
MAINTENANCE
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated.4 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Dealer Service verification:
Date:Mileage:
■��������� ����� ����� ��� �����
■������ �����
■ �������� ������� ����� �������� ����� ��� ����� ����������
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 47126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 476/3/20 6:09 PM6/3/20 6:09 PM

49Maintenance Log
MAINTENANCE LOG
MAINTENANCE
90,000 miles or 108 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
■������� ����� ��� ������
■������� ������ ��� ������
■������� ������ ��� ��� ��� �������
■��������� ����� ����� ��� �����
■������ �����
Inspect the following: _ Automatic transmission for signs of leakage
_Ball joints and dust covers
_Brake lines and hoses
_ Brake linings/drums and brake pads/discs4
_Drive shaft boots
_Engine/Inverter coolant5
_Exhaust pipes and mountings
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Tighten nuts and bolts on chassis and body

_ Fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses
_Fuel tank cap gasket
_Radiator, condenser and/or intercooler
_Rear differential oil (AWD)
_Steering gear
_Steering linkage and boots
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated. 4 Inspect thickness measurement and disc runout.5 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Dealer Service verification:
Date:Mileage:
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 49126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 496/3/20 6:09 PM6/3/20 6:09 PM

51Maintenance Log
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated.4 Initial engine coolant replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter Initial inverter coolant replacement at 150,000 miles/180 months. Replace every 50,000 miles/60 months thereafter.5 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
105,000 miles or 126 months
■Check installation of driver’s floor mat
■������� ��� ������ ��� ����� �������
■������� �� ������� ������� ������ �����
■������� ����� ������
NOTE: If 0W-16 oil WAS NOT used at the last oil change, replace engine oil and oil filter.2
Inspect the following: _Ball joints and dust covers _ Exhaust pipes and mountings
_Brake lines and hoses _ Radiator, condenser and/or intercooler
_Cabin air filter _ Steering gear
_Drive shaft boots _ Steering linkage and boots
_Engine/Inverter coolant5





Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect engine air filter
■������� ������ ��� ��� ��� �������
■������� ���� ��� ����� �� ������� ��� ����
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Replace engine oil and oil filter2
■������� ���� ��� ����� �� ������� ��� ����
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
■Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or door-to-door delivery use:
■Replace engine oil and oil filter2
Dealer Service verification:
Date: Mileage:
NOTE: Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may shorten the life of the cabin air filter. Replacement may be needed if you notice reduced airflow from the air conditioner and heater or if the windows fog easily when you use the Fresh mode. Consult your dealer if any of these conditions occur.
MAINTENANCE LOG
MAINTENANCE
■Re-torque drive shaft nut (AWD)
■������ �����
■ �������� ������� ����� �������� ����� ��� ����� ����������
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 51126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 516/3/20 6:09 PM6/3/20 6:09 PM

55Maintenance Log
MAINTENANCE
Driver’s Floor Mat
• Only use the driver’s floor mat
designed specifically for the model
and model year of your vehicle.
• Always properly secure the driver’s
floor mat using the retaining hooks.
• Never install another floor mat on top
of the existing driver’s floor mat.
• Never install the driver’s floor mat
upside down.
Engine Air Filter
Inspect or replace at specified intervals.
When performing inspections, check for
damage, excessive wear and oiliness, and
replace if necessary.
Engine/Inverter Coolant
Drain the cooling system and refill with an
ethylene-glycol type coolant. Inspect hoses
and connections for corrosion and leaks.
Tighten connections and replace parts
when necessary. A qualified technician
should perform these operations. (For
further details, refer to “Radiator, Condenser
and Hoses” in the “Maintenance and Care”
section of the Owner’s Manual).
Your Toyota is equipped with Genuine
Toyota Super Long-Life Coolant. The
replacement intervals for engine coolant
recommended in this booklet are based
on replacement with Genuine Toyota
Super Long-Life Coolant or similar
high-quality non-silicate, non-amine,
non-borate ethylene-glycol coolant with
long-life hybrid organic acid technology
(i.e., a combination of low phosphates
and organic acids). If another type of
ethylene-glycol coolant is used,
replacement intervals may be different.

EXPLANATION OF MAINTENANCE ITEMS
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 55126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 556/3/20 6:09 PM6/3/20 6:09 PM

56Maintenance Log
MAINTENANCE
EXPLANATION OF MAINTENANCE ITEMS
Engine Oil and Oil Filter
Replace the oil filter and drain and refill
the engine oil at specified intervals. For
recommended oil grade and viscosity,
refer to the Owner’s Manual.
NOTE: Your vehicle is certified with
Genuine Toyota 0W-16 motor oil. For
VEHICLES CERTIFIED FOR 0W-16 motor
oil, the oil change interval is 10,000 miles
or 12 months IF 0W-16 MOTOR OIL IS
BEING USED. If 0W-16 is not available,
0W-20 oil may be used. However,
it must be replaced at a 5,000-mile or
six-month INTERVAL with 0W-16 motor oil.
For customers who primarily drive their
vehicle under any of the listed Special
Operating Conditions, the motor oil and
filter should be replaced at 5,000 miles or
six months, REGARDLESS OF THE OIL USED
(OR CERTIFICATION OF THE VEHICLE).
Exhaust Pipes and Mountings
Visually inspect the exhaust pipes, muffler
and hangers for cracks, deterioration and
damage. Start the engine and listen
carefully for any exhaust gas leakage.
Tighten connections or replace parts
as necessary.
Fuel Lines and Connections,
Fuel Tank Band and Fuel Tank
Vapor Vent System Hoses
Visually inspect for corrosion, damage,
cracks, and loose or leaking connections.
Tighten connections or replace parts
as necessary.
Fuel Tank Cap Gasket
Visually inspect for cracks, deterioration
and damage and replace if necessary.
HV Battery Cooling Intake Filter
Clean at specified intervals. Refer to
“Cleaning the hybrid battery (traction battery)
air intake vent and filter” in the “Maintenance
and care” section of the Owner's Manual
for cleaning procedure.
Nuts and Bolts on Chassis
and Body
Retighten the seat-mounting bolts and
front /rear suspension member retaining
bolts to specified torque.
Radiator, Condenser
and/or Intercooler
Inspect for debris, corrosion and signs
of damage. Have any problem repaired
immediately by a qualified technician.
126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 56126570_19-TCS-14203 MY21 PRIUS WMG_GUTS 1H_R1.indd 566/3/20 6:09 PM6/3/20 6:09 PM