2021 TOYOTA AVALON HYBRID battery

SAFETY PRECAUTIONS
Your Avalon Hybrid has both high-voltage DC and AC systems as well as a 12-volt system.
Both DC and AC high voltage are very dangerous and can cause personal injury, severe burns,
electric shock and even fatal injury.
To avoid personal injury, please follow all caution labels attached to high-voltage parts. Do not
touch or attempt to remove or replace any high-voltage (orange-colored) wiring and connectors.
Do not touch the service plug located in the driver’s side trim of the trunk.
If an accident occurs, do not touch any high-voltage wiring, connectors or parts such as the
inverter unit or hybrid vehicle battery assembly.
Do not touch the potassium hydroxide electrolyte that might spill or leak from the hybrid vehicle
battery as the result of an accident. If potassium hydroxide electrolyte gets on your skin or in
your eyes, neutralize it immediately with a saturated boric acid solution (ratio: 80 grams boric
acid to two liters water). Seek immediate medical attention.
If a vehicle re occurs, extinguish it with a Class D powder-type re extinguisher.
Toyota recommends having maintenance and repairs for your Avalon Hybrid
performed by an authorized Toyota dealership. To locate your nearest authorized
Toyota dealership, contact the Toyota Customer Experience Center at (800) 331-4331
or log on to www.toyota.com .

12Your Warranties in Detail
GENERAL WARRANTY PROVISIONS
WARRANTY
WARRANTY COVERAGE AT A GLANCE
1 Exception of the Hybrid Battery Warranty coverage of 10 years/150,000 mi\
les, whichever occurs rst.2 Specic components may have longer coverage under terms of the Powert\
rain Warranty.3 Also applies to Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon,
Pennsylvania, Rhode Island, Vermont and Washington vehicles equipped with a California Certied Emission
Control System. Vehicles covered by this warranty are also covered by th\
e Federal Emission Control Warranty.

2
2
1
3
80
70
60
50
40
30
20
10 90 100
80
70
60
50
40
30
20 90 100 120

13Your Warranties in Detail
WARRANTY
NEW VEHICLE LIMITED WARRANTY
WHAT IS COVERED
AND HOW LONG
Basic Warranty
This warranty covers repairs and
adjustments needed to correct defects
in materials or workmanship of any
part supplied by Toyota, subject to the
exceptions indicated under “What
Is Not Covered” on pages 14–15.
Coverage is for 36 months or 36,000 miles,
whichever occurs rst, with the exception of
air conditioning recharge, wheel alignment
and wheel balancing, which are covered for
12 months or 12,000 miles, whichever
occurs rst.
Hybrid System Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of the components listed here and supplied
by Toyota, subject to the exceptions indicated
under “What Is Not Covered” on pages 14–15.
The Toyota Hybrid Warranty is in effect for
8 years or 100,000 miles from the vehicle’s
in-service date, whichever occurs rst for the
following components:
• Hybrid battery control module
(battery voltage sensor)
• Hybrid control module
(power management control module)
• Inverter with converter
Hybrid Battery Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of the components listed here and supplied
by Toyota, subject to the exceptions indicated
under “What Is Not Covered” on pages 14–15.
The Toyota Hybrid Battery Warranty is in
effect for 10 years or 150,000 miles from
the vehicle’s in-service date, whichever
occurs rst.


Powertrain Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of any component listed below and in the
next column and supplied by Toyota, subject
to the exceptions indicated under “What Is
Not Covered” on pages 14–15.
Coverage is for 60 months or 60,000 miles,
whichever occurs rst.
Engine
Cylinder block and head and all internal
parts, timing gears and gaskets, timing
chain/belt and cover, valve covers, oil pan,
oil pump, engine mounts, engine control
computer, water pump, fuel pump, seals
and gaskets.
Transaxle/Motor/Generator
Case and all internal parts, transaxle mounts,
seals and gaskets.
Front-Wheel-Drive System
Final drive housing and all internal parts,
axle shafts, drive shafts, constant velocity
joints, front hub and bearings, seals
and gaskets.

19Your Warranties in Detail
WARRANTYHybrid System
• Battery control module
(battery voltage sensor) (8/80)*
• Battery thermistor
• Electric vehicle junction box
• Generator
• Hybrid battery*
• Hybrid control module (power
management control module) (8/80)*
• Inverter with converter*
• Motor
• System main relay and battery
current sensor
Ignition System
• Ignition coil and ignitor
• Ignition wires
• Spark plugs
†



Positive Crankcase Ventilation
(PCV) System
• Oil filler cap
• PCV valve or orifice
Other Parts Used in
Above Systems
• Data link connector (8/80)
• Hoses, clamps, fittings, tubing and
mounting hardware
• Malfunction indicator light and bulb (8/80)
• Pulleys, belts and idlers
• Sealing gaskets and devices
• Sensors, solenoids, switches and valves
FEDERAL EMISSION CONTROL WARRANTY
* Covered under the Hybrid System Warranty for eight years or 100,000 miles, whichever occurs first, with the
exception of the hybrid battery covered for ten years or 150,000 miles, whichever occurs first.
† Warranted until first required maintenance under terms of the California Emission Control Warranty.
8/80 = Covered for eight years or 80,000 miles, whichever occurs first.

25Your Warranties in Detail
WARRANTY
CALIFORNIA EMISSION CONTROL WARRANTY
WHAT IS NOT COVERED
These warranty obligations do not apply
to failures or noncompliance caused by:
• The use of replacement parts not
certified in accordance with aftermarket
parts certification regulations.
• The use of replacement parts not
equivalent in quality or design to
original equipment parts.
Provisions under the “What Is Not Covered”
section of the New Vehicle Limited Warranty
also apply to this warranty.
PARTS LIST:
LONG-TERM EMISSION
DEFECT WARRANTY
The parts listed here are covered for seven
years or 70,000 miles from the vehicle’s
in-service date, whichever occurs rst.
Air Induction/Exhaust System
• Cam timing control motor
• Camshaft timing gear bolt
• Intake manifold
• Throttle body
Catalyst System
• Exhaust front pipe
(including catalytic converter)
• Exhaust manifold
(including manifold converter)
EGR System
• EGR cooler


Evaporative Control System
• Charcoal canister
• Fuel tank
Fuel Control System
• Engine control computer
(engine control module)
• Fuel delivery pipe
• Fuel pressure sensor
• High-pressure fuel pump
Hybrid System
• Battery control module
(battery voltage sensor)†
• Brake master cylinder for HV
• Hybrid battery
†
• Hybrid battery junction block
(including system main relay)
• Hybrid control module
†
• Inverter with converter†
• Transaxle (including motor
and generator)
• Water pump with motor
Ignition System
• Knock sensor
† Covered under the Hybrid System Warranty for eight years or 100,000 miles, whichever occurs first, with the exception of the
hybrid battery covered for ten years or 150,000 miles, whichever occurs first.

38Maintenance Log
MAINTENANCE LOG
MAINTENANCE
5,000 miles or 6 months
Add Toyota EFI Tank Additive or
equivalent (Hawaii and Puerto Rico only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect HV battery cooling intake lter5
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
6
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis
and body
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
10,000 miles or 12 months
Add Toyota EFI Tank Additive or
equivalent (Hawaii and Puerto Rico only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect HV battery cooling intake lter5
Inspect wiper blades
Replace cabin air filter
Replace engine oil and oil filter2
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
6
Tighten nuts and bolts on chassis
and body
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
D
EALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:

39Maintenance Log
MAINTENANCE LOG
MAINTENANCE
15,000 miles or 18 months
Add Toyota EFI Tank Additive or equivalent (Hawaii and Puerto Rico only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect HV battery cooling intake lter5
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums and brake pads/discs
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
_ Drive shaft boots _
Steering gear
_ Engine/Inverter coolant
4 _ Steering linkage and boots
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect engine air filter
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:6
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
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 lter 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:
D
ATE:
MILEAGE:

40Maintenance Log
MAINTENANCE LOG
MAINTENANCE
20,000 miles or 24 months
Add Toyota EFI Tank Additive or
equivalent (Hawaii and Puerto Rico only)
Check installation of driver’s floor mat
Clean HV battery cooling intake lter6
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace cabin air filter
Replace engine oil and oil filter2
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
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
25,000 miles or 30 months
Add Toyota EFI Tank Additive or
equivalent (Hawaii and Puerto Rico only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect HV battery cooling intake lter6
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs
NOTE: If 0W-16 oil WAS NOT used at
the last oil change, replace engine oil
and oil filter.
2
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
7
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis
and body
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:
D
ATE:
MILEAGE:
D
EALER SERVICE VERIFICATION:
D
ATE:
MILEAGE: