Toyota PRIUS Owner's Manual page 490

490
5-3. Using the storage features
Warning reflector storage space
The warning reflector can be stowed on the center auxiliary box.
(The warning reflector itself is not included as an original equipment)
Vehicles with emergency tire
puncture repair kit
Vehicles with full-size spare tire
Depending on the size and shape of the warning reflector case, etc., you may
not be able to store it.
WARNING
When storing the warning reflector, etc., make sure that it is properly stored.
If the warning reflector is not properly stored, it may fly out during emer-
gency braking and lead to an accident.
PRIUS_OM_OM47A31E_(EE)
Vehicles with compact spare
tire