2020 Lexus IS300 maintenance

4697-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
WARNING
The engine compartment contains many mechan isms and fluids that may move suddenly,
become hot, or become electrically energize d. To avoid death or serious injury, observe
the following precautions.
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel and
battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
(  P. 480)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner f ilter removed may cause excessive engine wear due to dirt
in the air.

4707-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
Pull the hood lock release lever.
The hood will pop up slightly.
Pull up the auxiliary catch lever and
lift the hood.
Hood
Release the lock from the inside of the vehicle to open the hood.
1
2
WARNING
■Pre-driving check
Check that the hood is fully closed and locked.
If the hood is not locked properly, it may op en while the vehicle is in motion and cause
an accident, which may result in death or serious injury.

4717-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
◆Front2WD models
AWD models
Positioning a floor jack
When using a floor jack, follow the inst ructions in the manual provided with
the jack and perform the operation safely.
When raising your vehicle with a floor jack, position the jack correctly.
Improper placement may damage your vehicle or cause injury.
1
2

4727-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
◆Rear
IS350 AWD/IS350/IS300 AWD/IS300 (vehicles without LSD [Limited
Slip Differential])
IS350 (vehicles with LSD [Limited Slip Differential])

4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
IS350 AWD/IS350/IS300 AWD
Engine compartment
Fuse boxes (P. 504)
Battery ( P. 482)
Engine oil level dipstick (P. 475)
Engine coolant reservoir (P. 478)
Engine oil filler cap ( P. 476)Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Radiator ( P. 480)1
2
3
4
5
6
7
8
9
10

4747-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
IS300
Fuse boxes ( P. 504)
Battery ( P. 482)
Intercooler
Engine oil level dipstick (P. 475)
Engine oil filler cap ( P. 476)
Engine coolant reservoir (P. 478) Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Intercooler radiator ( P. 478)
Radiator ( P. 480)
Intercooler coolant reservoir (P. 478)1
2
3
4
5
6
7
8
9
10
11
12
13

4757-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
With the engine at operating temperature and turned off, check the oil level on
the dipstick.
■Checking the engine oil
Park the vehicle on level ground. Afte r warming up the engine and turning
it off, wait more than 5 minutes for the oil to drain back into the bottom of
the engine.
Holding a rag under the end, pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull
the dipstick out and check the oil
level.
Low
Normal
Excessive
The shape of the dipstick may dif-
fer depending on the type of vehi-
cle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
IS350 AWD/IS350/
IS300 AWDIS300
3
4
5
1
2
3
6

4767-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
■Adding engine oil
If the oil level is below or near the lo w level mark, add engine oil of the same
type as that already in the engine.
Make sure to check the oil type and prepare the items needed before adding
oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following situations,
oil consumption may increase, and engine oil may need to be refilled in between oil
maintenance intervals.
●When the engine is new, for example directly after purchasing the vehicle or after
replacing the engine
●If low quality oil or oil of an inappropriate viscosity is used
●When driving at high engine speeds or with a heavy load, or when driving while accel-
erating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through
heavy traffic
IS350 AWD/IS350/
IS300 AWDIS300
Engine oil selection P. 590
Oil quantity (Low  Full) 1.6 qt. (1.5 L, 1.3 Imp. qt.)
Items Clean funnel
1
2
3