If the driver suddenly brakes, turns a corner sharply, or the vehicle receives an impact of about
5 mph (8 km/h) or more, the seatbelts lock to help reduce forward movement of the driver and passengers.
In addition, the seatbelt retractor locks if you pull the seatbelt webbing out too quickly. If the retractor locks, slowly lower the height adjuster to allow the seatbelt to retract.
If the retractor does not unlock, pull the seatbelt out slowly then feed a small length of webbing back toward the stowed position.