If a warning light turns on or a warning buzzer sounds...
Calmly perform the following actions if any of the warning lights turn on or flash. If a light turns on or flashes, but then turns off, this does not necessarily indicate a malfunction in the system.
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus dealer.

*: Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately 3 mph (5 km/h) or more.
- Stop the vehicle immediately.
- Have the vehicle inspected by your Lexus dealer immediately.
- Have the malfunction repaired immediately.
See also:
Stop the vehicle immediately.
A buzzer sounds and a warning message is shown on the multi-informa- tion display.
The following warning indicates the possibility of damage to the vehicle that may
lead to an accident. Immediatel ...
What is not covered
These warranty obligations do not
apply to failures or noncompliance
caused by:
• The use of replacement parts
not certified in accordance with
aftermarket parts certification
regulation ...
Cooling system
...
