Cummins · United States · Crit
Cummins ISX12, L9: Fuel system — fuel rail
Affects Cummins ISX12, L9 · — — about 45K vehicles.
The hazard
A fuel leak in the presence of an ignition source increases the risk of a fire.
What to do
Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owner letters were mailed July 30, 2021. Owners may contact Cummins customer service at 1-800-286-6467.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational