The problem has two roots, according to the recall report. During development of the flat tire repair kit, the design failed to account for pressure that could build up if the nozzle were improperly connected, which led to the inclusion of an unnecessary fluid leak prevention valve. Separately, certain relief valves were set incorrectly during supplier manufacturing, preventing pressure from escaping as intended. When the tire repair kit is used, pressure can accumulate inside the sealant bottle, causing the cap to detach and become a projectile that could strike the user or bystanders, raising the risk of injury.