Kia EV9 2023 Owner's Manual page 164

Vehicle safety controls Active hood system
NOTE
僅 Do not remove or change the components and the wiring of the active hood system.
僅 Do not change the front bumper or the body structure.
僅 Do not install or assemble any aftermarket accessory on the front bumper or cover.
僅 When replacing tires, make sure they are the same size as your original tires. If you drive
with different tire or wheel sizes, the active hood system may not work normally.
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