2021 TOYOTA TUNDRA check engine

51Maintenance Log
MAINTENANCE LOG
MAINTENANCE
105,000 miles or 12 6 months
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Re-torque propeller shaft bolt
NOTE: 0W-20 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 _
Front differential oil (4WD)
_ Cabin air filter _
Radiator and condenser
_ Drive belts _
Rear differential oil
_ Drive shaft boots (4WD)
_
Steering gear
_ Engine coolant6 _
Steering linkage and boots
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.
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:7
Replace engine oil and oil filter2
Replace front differential oil (4WD)
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:
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 Toyo t a 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 Includes operating on roads which road salt has been applied. 5 Initial replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter. Refer to “Engine
Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.
6 Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs

52Maintenance Log
MAINTENANCE LOG
MAINTENANCE
110,000 miles or 13 2 months
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
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 (4WD)
Inspect engine air filter
Inspect steering linkage and boots
Re-torque propeller shaft bolt4
Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
8
Re-torque propeller shaft bolt4
Tighten nuts and bolts on chassis
and body
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
115,000 miles or 13 8 months
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums
and brake pads/discs
NOTE: If 0W-20 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 (4WD)
Inspect engine air filter
Inspect steering linkage and boots
Replace engine oil and oil filter2
Re-torque propeller shaft bolt4
Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
8
Replace engine oil and oil filter2
Re-torque propeller shaft bolt4
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:

53Maintenance Log
MAINTENANCE LOG
MAINTENANCE
120,000 miles or 14 4 months
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace cabin air filter
Replace engine air filter
Inspect the following:
_ Automatic transmission for
signs of leakage
_ Ball joints and dust covers
_ Brake lines and hoses
_ Brake linings/drums and
brake pads/discs
6
_ Drive belts
_ Drive shaft boots (4WD)
_ Engine coolant
7
_
Exhaust pipes and mountings
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Replace transfer case oil (4WD)
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:
8
Replace automatic transmission fluid
Replace front differential oil (4WD)
Replace rear differential oil
Replace transfer case oil (4WD)
Tighten nuts and bolts on chassis and body
DEALER SERVICE VERIFICATION:
D
ATE:
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 Toyo t a 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 Includes operating on roads which road salt has been applied. 5 Maintenance services of spark plugs are required under the terms of the Emissions Control Warranty. 6 Inspect thickness measurement and disc runout.7 Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.8 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
_
Front differential oil (4WD)
_ Fuel lines and connections, fuel tank band
and fuel tank vapor vent system hoses
_ Fuel tank cap gasket
_ Radiator and condenser
_ Rear differential oil
_ Steering gear
_ Steering linkage and boots
_ Transfer case oil (4WD)
Replace engine oil and oil filter2
Replace spark plugs5
Re-torque propeller shaft bolt
Rotate tires

55Maintenance Log
MAINTENANCE
EXPLANATION OF MAINTENANCE ITEMS
Drive Shaft Boots
Check the drive shaft boots and clamps for
cracks, deterioration and damage. Replace
any deteriorated or damaged parts and, if
necessary, repack the grease. A qualied
technician should perform these operations.
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 specied intervals.
When performing inspections, check for
damage, excessive wear and oiliness, and
replace if necessary.
Engine Coolant
Drain the cooling system and rell with an
ethylene-glycol type coolant. Inspect hoses
and connections for corrosion and leaks.
Tighten connections and replace parts
when necessary. A qualied 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 Toyo t a is equipped with Genuine
Toyo t a Super Long-Life Coolant. The
replacement intervals for engine coolant
recommended in this booklet are based
on replacement with Genuine Toyo t a
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.

56Maintenance Log
MAINTENANCE
EXPLANATION OF MAINTENANCE ITEMS
Engine Oil and Oil Filter
Replace the oil lter and drain and rell
the engine oil at specied intervals. For
recommended oil grade and viscosity,
refer to the Owner’s Manual.
NOTE: Your vehicle is certied with
Genuine Toyo t a 0W-20 motor oil. For
VEHICLES CERTIFIED FOR 0W-20 motor
oil, the oil change interval is 10,000 miles
or 12 months IF 0W-20 MOTOR OIL IS
BEING USED. If 0W-20 is not available,
5W-20 mineral oil may be used. However,
it must be replaced at a 5,000-mile or
six-month INTERVAL with 0W-20 motor oil.
For customers who primarily drive their
vehicle under any of the listed Special
Operating Conditions, the motor oil and
lter 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, mufer
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.
Front and Rear Differential Oil
Inspect or replace at specied intervals.
When performing inspections, check each
component for signs of leakage. If you
discover any leakage, have it repaired by
a qualied technician immediately.
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.
Nuts and Bolts on Chassis
and Body
Retighten the seat-mounting bolts and
front/rear suspension member retaining
bolts to specied torque.
Propeller Shaft
Re-torque the propeller shaft bolt. Only
a qualied technician should perform
this operation.
Radiator and Condenser
Inspect for debris, corrosion and signs
of damage. Have any problem repaired
immediately by a qualied technician.
Spark Plugs
Replace at specied intervals. Install new
plugs of the same type as originally
equipped. A qualied technician should
perform this operation.