2012 Lexus IS250 suspension

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1-7. Safety information
IS350/250_U
CAUTION
■Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifications with-
out consulting your Lexus dealer.
The SRS airbag may malfunction or deploy (inflate) accidentally, causing death or
serious injury.
●Installation, removal, disassembly and repair of the SRS airbags
●Repairs, modifications, removal or replacement of the steering wheel, instrument
panel, dashboard, seats or seat upholstery, front, side and rear pillars or roof side
rails
●Repairs or modifications of the front fender, front bumper, or side of the occupant
compartment
●Installation of snow plows, winches, etc. to the front grille (bull bars, kangaroo bar
etc.)
●Modifications to the vehicle's suspension system
●Installation of electronic devices such as mobile two-way radios or CD players
●Modifications to your vehicle for a person with a physical disability

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2-4. Using other driving systems
2
When driving
IS350/250_U
CAUTION
■TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC system is operating.
Do not drive the vehicle in conditions where stability and power may be lost.
■If hill-start assist control does not operate effectively
(vehicles with an automatic transmission)
Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered in ice.
■When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause
an accident, resulting in death or serious injury. Exercise particular care when the
indicator light flashes.
■When TRAC and VSC are off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are systems to help enhance vehicle stability and driving force, do not turn off
TRAC and VSC unless necessary.
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
pressure level.
The ABS, VSC and TRAC systems will not function correctly if different tires are fit-
ted on the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
■Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause the system to malfunction.

5
When trouble arises
469
5-1. Essential information
IS350/250_U
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

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7
IS350/250_U
For owners
ATTENTION
■Précautions avec les sacs de sécurité gonflables SRS
●Si vous avez des difficultés à respirer après le déploiement d'un sac de sécurité
gonflable SRS, ouvrez une porte ou une vitre pour faire entrer de l'air frais, ou
bien descendez du véhicule si cela ne présente pas de danger. Essuyez tout
résidu dès que possible afin d'éviter d'éventuelles irritations de la peau.
●Si les parties renfermant les sacs de sécurité gonflables SRS, telles que la
garniture du moyeu de volant et la garniture de montant avant, apparaissent
abîmées ou craquelées, faites-les remplacer par votre concessionnaire Lexus.
■Modification et mise au rebut des éléments du système de sacs de sécurité
gonflables SRS
Consultez impérativement votre concessionnaire Lexus si vous avez besoin
d'intervenir sur votre véhicule ou de procéder à l'une des modifications suivantes.
Le sac de sécurité gonflable SRS risque de ne pas fonctionner correctement ou de
se déclencher (déployer) accidentellement, ce qui pourrait risquer de vous tuer ou
blesser grièvement.
●Installation, dépose, démontage et réparations des sacs de sécurité gonflables
SRS
●Réparations, modifications, démontage ou remplacement du volant, du tableau
de bord, de la planche de bord, des sièges ou de leur garnissage, des montants
avant, latéraux et arrière ou des rails latéraux de toit
●Réparation ou modification des ailes avant, du bouclier avant, ou des flancs de
l'habitacle
●Installation d'un chasse-neige, d'un treuil, etc. sur la calandre (pare-buffle, pare-
kangourou, etc.)
●Modification des suspensions du véhicule
●Installation d'appareils électroniques tels que radio émetteur/récepteur ou
lecteurs CD.
●Aménagements du véhicule visant à permettre sa conduite par une personne
atteinte d'un handicap physique