Lexus NX350 2022 Owner's Manual page 151

Situations where idling is necessary before stopping the engine
(NX350)
To prevent damage to the turbocharger, immediately after high-load driving, such
as continuous driving up steep mountain roads, driving on a race track, or when
towing a trailer or another vehicle (vehicles with a towing package), allow the
engine to idle for approximately 1 minute before stopping the engine.
Idling is not necessary after normal city driving or high-speed driving (at the legal
or recommended highway speed limit).
2-1. Starting and stopping the engine
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