2003 Lexus IS300 suspension

COMFORT ADJUSTMENT
124
CAUTION
Do not modify, remove, strike or open the front seat belt
pretensioner assemblies, airbag sensor or surrounding
area or wiring. Doing any of these may cause sudden
operation of the front seat belt pretensioners or disable
the system, which could result in death or serious
injury.
Failure to follow these instruction can result in death or
serious injury. Consult your Lexus dealer about any
repairs and modifications.
NOTICE
Do not perform any of the following changes without consulting your Lexus dealer. Such changes caninterfere with proper operation of the front seat beltpretensioners in some cases.
Installation of electronic devices such as a mobiletwo±way radio, cassette tape player or compact disc
player.
Repairs on or near the front seat belt retractor assemblies.
Modification of the suspension system.
Modification of the front end structure.
Attachment of a grille guard (bull bar, kangaroo bar,etc.), snowplow, winches or any other equipment tothe front end.
Repairs made on or near the front fenders, front endstructure or console.
2003 IS300 from Aug. '02 Prod. (OM53439U)

COMFORT ADJUSTMENT
138
NOTICE
Do not perform any of the following changes withoutconsulting your Lexus dealer. Such changes caninterfere with proper operation of the SRS airbagsystem in some cases.
Installation of electronic devices such as a mobiletwo±way radio, cassette tape player or compact disc
player.
Modification of the suspension system.
Modification of the front end structure and side structure of the passenger compartment.
Attachment of a grille guard (bull bar, kangaroo bar,etc.), snowplow, winches or any other equipment tothe front end.
Repairs made on or near the front fenders, front endstructure, console, steering column, steering wheel,dashboard near the front passenger airbag or frontseats.
SV16061
This SRS front airbag system has an indicator to inform the
driver of operating problems. If either of the following
conditions occurs, this indicates a malfunction of the airbags.
Contact your Lexus dealer as soon as possible to service the
vehicle.
 When the ignition key is turned to the ºACCº or ºONº
position, the light does not come on, stays on or flashes.
 The light comes on or starts flashing while driving.
If the light stays on, it indicates that the driver and front
passenger airbags fail. If the light flashes, the side airbags fail.
2003 IS300 from Aug. '02 Prod. (OM53439U)

MAINTENANCE
296
DOES YOUR VEHICLE NEEDREPAIRING?
Be on the alert for changes in performance and sounds, and
visual tip±offs that indicate service is needed. Some important
clues are:

Engine missing, stumbling, or pinging

Appreciable loss of power

Strange engine noises

A fluid leak under the vehicle (however, water dripping from
the air conditioning after use is normal.)

Change in exhaust sound (This may indicate a dangerous
carbon monoxide leak. Drive with the windows open and
have the exhaust system checked immediately.)

Flat±looking tires, excessive tire squeal when cornering,
uneven tire wear

Vehicle pulls to one side when driving straight on a level
road

Strange noises related to suspension movement

Loss of brake effectiveness, spongy feeling brake pedal,
pedal almost touches floors, vehicle pulls to one side when
braking

Engine coolant temperature continually higher than normal
If you notice any of these clues, take your vehicle to your Lexus
dealer as soon as possible. It probably needs adjustment or
repair.
CAUTION
Do not continue driving with the vehicle unchecked. It
could result in serious vehicle damage and possibly
personal injury.
2003 IS300 from Aug. '02 Prod. (OM53439U)

SECTION 6 ± 3
323
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications324
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Checking brake fluid 329
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.
Checking power steering fluid 330
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Checking tire pressure 331
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Rotating tires 333
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Checking and replacing tires 335
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Installing snow tires and chains 338
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Replacing wheels 340
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. . .
Aluminum wheel precautions 341
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Suspension and chassis 342
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2003 IS300 from Aug. '02 Prod. (OM53439U)

CHASSIS
342
SUSPENSION AND CHASSIS
CAUTION
Do not modify the suspension/chassis with lift kits,
spacers, springs, etc. It can cause dangerous handling
characteristics, resulting in loss of control.
2003 IS300 from Aug. '02 Prod. (OM53439U)