2012 Toyota Prius Owners Manual - Page 828

5-2. Steps to take in an emergency STEP 6 Remove all the wheel nuts and the tire. When resting the tire on the ground, place the tire so that the wheel design faces up to avoid scratching the wheel surface. ITO52P114 Installing the spare tire STEP 1 Remove any dirt or foreign matter from the wheel contact surface. If foreign matter is on the wheel contact surface, the wheel nuts may loosen while the vehicle is in motion, and the tire may come off the vehicle. STEP 2 Install the tire and loosely tighten each wheel nut by hand by approximately the same amount. 528