Seatbelt pretensioners cinch the seatbelts during certain types of frontal impacts. Pretensioning can help the belt to immediately begin absorbing the occupants' forward momentum and help them avoid injury. All Toyota vehicles with seatbelt pretensioners also feature force limiters. After the pretensioners deploy and a preset amount of force has been reached, force limiters slowly release tension on the belt to help absorb the energy of an impact.