Page 290 of 437
272
4-3. Do-it-yourself maintenance
Engine coolantThe coolant level is satisfactory if it is between the FULL and LOW lines
on the reservoir when the engine is cold. Reservoir cap
Full
Low
If the level is on or below the LOW
line, add coolant up to the FULL
line.
NOTICE
■To prevent serious engine damage:
Check the oil level on regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly retightened.
Page 363 of 437
5
When trouble arises
345
5-2. Steps to take in an emergency
Wa r n i n g m e s s a g eDetailsCorrection procedure
Indicates that engine oil
level is low.Check the level of engine
oil, and add if necessary.
(U.S.A. only)
Indicates that the engine
oil is scheduled to be
changed.
Check the engine oil, and
change if necessary.
Comes on approximately
4500 miles (7200 km)
after the engine oil is
changed. (The indicator
will not work properly
unless the oil mainte-
nance data has been
reset).
(U.S.A. only)
Indicates that the engine
oil should be changed.
Check and change the
engine oil.
Comes on approximately
5000 miles (8000 km)
after the engine oil is
changed (and the oil
maintenance data has
been reset).
Page 396 of 437

378
6-1. Specifications
Lubrication system
*: 5W-30 is an oil that provides optimal levels of fuel efficiency.
Oil viscosity
● The 5W portion of the o il viscosity rating indicates a characteristic of the
oil which allows cold st artability. Oils with a lower value before the W
allow for easier starting of the engine in cold weather.
● The 30 in 5W-30 indicates the oil viscosity when the oil is at its operating
temperature. An oil with a higher viscosity may be better suited if the
vehicle is operated at high speeds, or under extreme load condition.
IS250IS350
Oil capacity
(drain and refill)
with filter
2WD models
AWD models
6.6 qt. (6.3 L, 5.5 lmp.qt.)
6.8 qt. (6.4 L, 5.7 lmp.qt.)6.6 qt. (6.3 L, 5.5 lmp.qt.)
without filter
2WD models
AWD models
6.2 qt. (5.9 L, 5.2 lmp.qt.)
6.3 qt. (6.0 L, 5.3 lmp.qt.)6.2 qt. (5.9 L, 5.2 lmp.qt.)
Oil gradeILSAC multi-grade engine oil
Recommended oil
viscosity
Use Lexus approved "Toyota Genuine Motor Oil" or
equivalent to satisfy the above grade and viscosity.
Temperature range anticipated before
next oil change
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415
Alphabetical index
TrunkExtending a space .............................. 231
Opener.......................................................23
Trunk light Trunk light ................................................. 24
Wattage .................................................388
Turn signal lights Replacing light bulbs ......................... 314
Switch ........................................................103
Wattage .................................................388
Vanity lights Vanity lights ............................................ 216
Wattage .................................................388
Vanity mirrors ............................................. 216
VDIM (Vehicle dynamics integrated managem ent)................. 144
Vehicle dynamics integrated management (VDIM) ....................... 144
Vehicle identification number .........375
Vehicle stability control (VSC) ........ 144
Ventilators................................................226
VSC (Vehicle stability control) ........ 144
Warning buzzers Brake system ....................................... 333
Open door .......................................... 335
Seat belt reminder ............................ 334
Warning lights Anti-lock brake system (ABS) ... 334
Brake assist system .......................... 334
Brake system ....................................... 333
Charging system ............................... 334
Electric power steering warning light ..................................... 334 Electronic engine control
system ..................................................334
Low fuel level ...................................... 335
Low tire pressure warning light ....................................................... 335
Master warning light........................ 335
Open door ........................................... 335
Pre-collision system..........................334
Pretensioners .......................................334
Seat belt reminder light.................. 335
SRS airbags...........................................334
Warning messages AWD system .......................................339
Dynamic radar cruise control....................... 339, 343
Engine oil level ....................................343
Engine oil maintenance ..................343
Engine oil pressure .......................... 338
Hill-start assist control ..................... 342
Hood ........................................................343
Lexus parking assist sensor ...................................... 339, 343
Moon roof .............................................343
Open door ............................................343
Parking brake ......................................343
Pre-collision system............. 339, 343
Smart access system with push-button start ............................349
Steering lock.........................................339
Tire inflation pressure warning system................... 339, 343
Traction control (TRC) ................... 342
Trunk ........................................................343
Vehicle stability control (VSC)................................................... 342
Washer fluid .........................................343
V
W