The SRS airbags inflate when the vehicle is subjected to certain types of severe impacts that may cause significant injury to the occupants. They work together with the seat belts to help reduce the risk of death or serious injury.
1. Driver airbag/front passenger airbag.
Can help protect the head and chest of the driver and front passenger from impact with interior components.
2. Knee airbags.
Can help provide driver and front passenger protection.
Side and curtain shield airbags
3. Side airbags.
Can help protect the torso of the front seat occupants and rear seat outside occupants.
4. Curtain shield airbags.
Can help protect primarily the head of outside occupants.
Airbag system components
1. Front passenger airbag.
2. Curtain shield airbags.
3. AIR BAG ON and AIR BAG OFF indicator lights.
4. Side airbags for the front passengers.
5. Side and curtain shield airbag sensors.
6. Curtain shield airbag sensors.
7. Side airbags for the rear outside passengers.
8. SRS warning light.
9. Driver airbag.
10. Driver's seat position sensor.
11. Knee airbags.
12. Driver's seat belt buckle switch.
13. Front passenger’s seat belt buckle switch.
14. Airbag sensor assembly.
15. Occupant detection system (ECU and sensors).
16. Front airbag sensors.
Your vehicle is equipped with ADVANCED AIRBAGS designed based on US motor vehicle safety standards (FMVSS208). The airbag system controls airbag deployment power for the driver and front passenger. The driver airbag system consists of the driver seat’s position sensor etc. The front passenger’s airbag system consists of the front passenger occupant classification sensor etc.
The main SRS airbag system components are shown above. The SRS airbag system is controlled by the airbag sensor assembly. The airbag sensor assembly consists of a safing sensor and an airbag sensor.
In certain types of severe frontal or side impacts, the SRS airbag system triggers the airbag inflators. A chemical reaction in the inflators quickly fills the airbags with non-toxic gas to help restrain the motion of the occupants.
If the SRS airbags deploy (inflate)
l Bruising and slight abrasions may result from contact with a deploying
- A loud noise and white powder will be emitted.
- Parts of the airbag module (steering wheel hub, airbag cover and inflator) as
well as the seats, and parts of the front pillar, rear pillar and roof side
rail, may be
hot for several minutes. The airbag itself may also be hot.
- The windshield may crack.
- For Safety Connect subscribers, if the SRS airbags deploy or in the event of a
severe rear-end collision, the system is designed to send an emergency call to
the response center, notifying them of the vehicle’s location (without needing
push the “SOS” button) and an agent will attempt to speak with the occupants to ascertain the level of emergency and assistance required. If the occupants are unable to communicate, the agent automatically treats the call as an emergency
and helps to dispatch the necessary emergency services.
SRS airbag deployment conditions (front airbags)
l The front SRS airbags will deploy in the event of an impact that exceeds
threshold level (the level of force corresponding to a 12 - 18 mph [20 - 30 km/h]
frontal collision with a fixed wall that does not move or deform).
However, this threshold velocity will be considerably higher if the vehicle
an object, such as a parked vehicle or sign pole, which can move or deform on impact, or if the vehicle is involved in an underride collision (e.g. a collision in
which the front of the vehicle “underrides”, or goes under, the bed of a truck, etc.).
- It is possible that in some collisions where the forward deceleration of the
is very close to the designed threshold level, the SRS front airbags and the seat belt pretensioners may not activate together.
SRS airbag deployment conditions (side and curtain shield airbags)
The SRS side airbags will deploy in the event of an impact that exceeds the
threshold level (the level of force corresponding to the impact force produced by a
1500 kg [3300 lb.] vehicle colliding with the vehicle cabin from a direction perpendicular
to the vehicle orientation at a speed of 12 - 18 mph [20 - 30 km/h]).
Conditions under which the SRS airbags may deploy (inflate), other than a collision
The SRS front airbags may also deploy if a serious impact occurs to the
your vehicle. Some examples are shown in the illustration.
Hitting a curb, edge of pavement or hard surface.
- Falling into or jumping over a deep hole.
- Landing hard or vehicle falling.
Types of collisions that may not deploy the SRS airbag (front airbags)
The SRS front airbags are generally not designed to inflate if the vehicle is
in a side or rear collision, if it rolls over, or if it is involved in a low-speed frontal collision.
But, whenever a collision of any type causes sufficient forward deceleration of the vehicle, deployment of the SRS front airbags may occur.
Collision from the rear.
- Collision from the side.
- Vehicle rollover.
Types of collisions that may not deploy the SRS airbag (side and curtain shield airbags)
The SRS side airbag and curtain shield airbag system may not activate if the
is subjected to a collision from the side at certain angles, or a collision to the side of
the vehicle body other than the passenger compartment.
Collision from the side to the vehicle body other than the passenger compartment.
- Collision from the side at an angle.
The SRS side airbags and curtain shield airbags are not generally designed to
inflate if the vehicle is involved in a frontal or rear collision, if it rolls
over, or if it is
involved in a low-speed side collision.
Collision from the rear.
- Collision from the front.
- Vehicle rollover.
When to contact your Lexus dealer
In the following cases, contact your Lexus dealer as soon as possible. Do not
the battery cables before contacting your Lexus dealer.
- Any of the SRS airbags have been inflated.
The front of the vehicle is damaged or deformed, or was involved in an accident that was not severe enough to cause the SRS airbags to inflate.
A portion of the doors is damaged or deformed, or the vehicle was involved in an accident that was not severe enough to cause the SRS side airbags and curtain shield airbags to inflate.
The pad section of the steering wheel, dashboard near the front passenger airbag or lower portion of the instrument panel is scratched, cracked, or otherwise damaged.
The portion of the containing the side airbag is scratched, cracked, or otherwise damaged.
- The portion of the front pillars, rear pillars or roof side rail garnishes (padding) containing the curtain shield airbags inside is scratched, cracked, or otherwise damaged.
SRS airbag precautions
Observe the following precautions regarding the airbags.
Failure to do so may cause death or serious injury.
- The driver and all passengers in the vehicle must wear their seat belts properly.
The SRS airbags are supplemental devices to be used with the seat belts.
- The SRS driver airbag deploys with considerable force, and can cause death or
serious injury especially if the driver is very close to the airbag. The
Highway Traffic Safety Administration (“NHTSA”) advises: Since the risk zone for driver airbag is the first 2 - 3 in. (50 - 75 mm) of inflation,
placing yourself 10 in. (250 mm) from your driver airbag provides you with a clear margin of safety. This distance is measured from the center of the steering
wheel to your breastbone. If you sit less than 10 in. (250 mm) away now, you can change your driving position in several ways: • Move your seat to the rear as far as you can while still reaching the pedals comfortably.
• Slightly recline the back of the seat. Although vehicle designs vary, many
can achieve the 10 in. (250 mm) distance, even with the driver seat all the way forward, simply by reclining the back of the seat somewhat. If reclining the back of your seat makes it hard to see the road, raise yourself by using a firm, non-slippery cushion, or raise the seat if your vehicle has that feature.
• If your steering wheel is adjustable, tilt it downward. This points the airbag toward your chest instead of your head and neck.
The seat should be adjusted as recommended by NHTSA above, while still
control of the foot pedals, steering wheel, and your view of the instrument panel controls.
SRS airbag precautions
If the seat belt extender has been connected to the driver's seat belt buckle but the seat belt extender has not also been fastened to the latch plate of the driver's seat belt, the SRS driver's airbag system will judge that the driver is wearing the seat belt even though the seat belt has not been connected. In this case, the driver's airbag may not activate correctly in a collision, resulting in death or serious injury in the event of collision. Be sure to wear the seat belt with the seat belt extender.
The SRS front passenger airbag also deploys with considerable force, and can
cause death or serious injury especially if the front passenger is very close to
airbag. The front passenger seat should be as far from the airbag as possible with
the seatback adjusted, so the front passenger sits upright.
- Improperly seated and/or restrained infants and children can be killed or
injured by a deploying airbag. An infant or child who is too small to use a seat belt should be properly secured using a child restraint system. Lexus strongly
recommends that all infants and children be placed in the rear seats of the vehicle
and properly restrained. The rear seats are the safest for infants and children.
SRS airbag precautions
Do not sit on the edge of the seat or lean against the dashboard.
Do not allow a child to stand in front of the SRS front passenger airbag unit or sit on the knees of a front passenger.
- Do not drive the vehicle while the driver or passenger have items resting on their knees.
Do not lean against the door, the roof side rail or the front, side and rear pillars.
Do not allow anyone to kneel on the passenger seat toward the door or put their head or hands outside the vehicle.
SRS airbag precautions
Do not attach anything to or lean anything against areas such as the dashboard, steering wheel pad or lower portion of the instrument panel.
These items can become projectiles when SRS driver, front passenger and knee airbags deploy.
Do not attach anything to areas such as the door, windshield glass, side door glass, front and rear pillars, roof side rail or assist grip.
- Do not hang coat hangers or other hard objects on the coat hooks. All of these items could become projectiles and seriously injure or kill you, should the SRS curtain shield airbag deploy.
If the vinyl cover is put on the area where the SRS knee airbag will deploys, be sure to remove it.
- Do not use seat accessories which cover the parts where the SRS side airbags inflate as they may interfere with inflation of the airbags.
- Do not strike or apply significant levels of force to the area of the SRS
components shown on P. 86.
Doing so can cause the SRS airbags to malfunction.
- Do not touch any of the component parts immediately after the SRS airbags have deployed (inflated) as they may be hot.
- If breathing becomes difficult after the SRS airbag has deployed, open a door
window to allow fresh air in, or leave the vehicle if it is safe to do so. Wash off any
residue as soon as possible to prevent skin irritation.
- If the areas where the SRS airbags are stored, such as the steering wheel pad
front pillar garnish, are damaged or cracked, have them replaced by your Lexus dealer.
Modification and disposal of SRS airbag system components Do not dispose of your vehicle or perform any of the following modifications without
consulting your Lexus dealer.
The SRS airbag may malfunction or deploy (inflate) accidentally, causing death
- Installation, removal, disassembly and repair of the SRS airbags
- Repairs, modifications, removal or replacement of the steering wheel,
panel, dashboard, seats or seat upholstery, front, side and rear pillars or roof side
- Repairs or modifications of the front fender, front bumper, or side of the occupant
- Installation of snow plows, winches, etc. to the front grille (bull bars, kangaroo bar
- 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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