The power windows and mirrors stop working because of a problem with an electrical junction block—where power from the battery is distributed to that system.
Problems for specific Toyota Land Cruiser years:
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Most reported 1999 Toyota Land Cruiser problems
The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.