Technical Service Bulletin CB22-J-001B — 2022 ISUZU F-SERIES

Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022MY Isuzu F-Series vehicles produced through January 31, 2022. In the affected vehicles, the quick connector used to connect the fuel suction hose to the fuel inlet pipe of the engine was incorrectly sized with a larger quick connector. Because of the larger diameter of the quick connector, the sealing performance at this connection point is inadequate, resulting in the possibility of diesel fuel leakage from the connection point during the manufacturing or servicing process, which potentially increases the risk of a fire. It is also possible that the gap may allow outside air to be sucked into the fuel hose while the engine is running. Air intake into the fuel hose potentially increases the risk of engine stalling, which could lead to a crash.