2006 Lexus GS 300 Owners Manual - Page 803

OCCUPANT RESTRAINT SYSTEMS D Be sure to wear the seat belt without the seat belt extender if you can fasten the seat belt without the extender. G16018 D Do not use the seat belt extender when installing a child restraint system on the front or rear passenger seat. If installing a child restraint system with the seat belt extender connected to the seat belt, the seat belt will not securely hold the child restraint system, which could cause death or serious injury to the child or other passengers in the event of collision. D 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, causing death or serious injury in the event of a collision. Be sure to wear the seat belt with the seat belt extender. Otherwise, there will also not be any effective protection in a sudden stop or a collision provided by the seat belt. 157