Certain school buses equipped, at customer request, with passenger seatbelts, may suffer seatbelt failure. The edge of the metal seatbelt retainer strips may cause chafe damage to the belts. Correction: Dealers will inspect and, if chafe damage is found, replace seatbelt assemblies. Seatbelt retainer strips will either be replaced or modified to prevent future chafing. Note: This action is deemed a product improvement campaign and is not being conducted under the Motor Vehicle Safety Act.