One problem related to rear seat belt has been reported for the 1999 Toyota Avalon. The most recently reported issues are listed below.
Rear occupants are not able to restrain themselves because seat belts are hidden between the seats. Dealer has been contacted. Manufacturer modified the design on later models but no retrofit on existing vehicle.
| Seat Belt problems | |
| Rear Seat Belt problems | |
| Front Seat Belt Buckle Assembly problems | |
| Front Seat Belt Webbing problems |