The "maintenance required" light illuminates on the instrument panel of the Lexus 350 every 3,000 to 5,000 miles. This light is to remind the car owner that it's time to have the Lexus serviced for an oil change and, depending on mileage, any other recommended maintenance service procedures listed in the manual. It should not be confused with the "check engine" icon that illuminates on the instrument panel. The "check engine" light indicates a sensor or circuit has triggered a diagnostic trouble code and should be dealt with immediately.
Step 1
Press the odometer/trip button on the instrument panel until "Trip A" displays the actual mileage of the Lexus. Hold the button down until the reset procedure is complete.
Step 2
Place the key in the ignition, and turn it to the key-on/engine-off (KOEO) position. The KOEO position is two clicks forward in the ignition switch and will empower the accessories without the engine running.
Step 3
Watch the odometer setting until six dashes are displayed. Each one will blink off. When the last one blinks off, the reading displayed on the odometer/trip button will display 000000.
Tip
Some Lexus 350 models feature ignition start buttons without ignition keys. The procedure to reset the maintenance required light is the same, but to get to the KOEO position, press the start button twice while holding the odometer/trip button, then wait for the dashes to count down and display the six zeros. On these models, make sure you're not stepping on the brake pedal at the same time, or the reset procedure will not be accepted.