Lexus GS450h2016 Service Manual page 523

When a problem has occurred
If you have a flat tire
Stop the vehicle in a safe place and replace the flat tire with the spare tire.
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(P. 437)
The vehicle becomes stuck
Try the procedure for when the vehicle becomes stuck in mud, dirt, or snow.
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(P. 462)
GS450h_OM_OM30E99U_(U)
What to do if... (Troubleshooting)
523