Blocking wheels
Nissan Sentra / Nissan Sentra Owners Manual / In case of emergency / Flat tire / Changing a flat tire / Blocking wheels

Blocking wheels
Place suitable blocks 1 at both the front and back of the wheel diagonally opposite the flat tire 2 to prevent the vehicle from moving when it is jacked up.

Be sure to block the wheel as the vehicle may move and result in personal injury.
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