Fuel Filter Hoses May Disconnect and Leak Fuel

Affected vehicles (1)

Component / system

Defect

Cummins Inc. (Cummins) is recalling certain L9 diesel engines, part number D563027BX03. The remote fuel filter hoses may separate from the fitting, causing a fuel leak and an engine stall.

Risk / consequence

A fuel leak in the presence of an ignition source increases the risk of a fire. An engine stall increases the risk of a crash.

Remedy

Dealers will replace the fuel hoses, free of charge. Owner notification letters were mailed March 11, 2025. Owners may contact Cummins customer service at 1-800-286-6467. Cummins's number for this recall is C7111.

Chronology of events

1. Oct 4, 2024

   10/04/2024 – Cummins was informed of fuel leaks on the subject hoses by a transit bus customer.

2. Oct 14, 2024

   10/14/2024 – 10/31/2024 Cummins requested the failed parts for failure analysis with failed parts then forwarded on to the supplier to complete additional analysis. 10/31/2024 – 1/10/2025 – Cummins conducted a product safety investigation. Cummins worked with the supplier and identified the crimp station of the overflow line (used to accommodate extra build demand) at the supplier had not been updated to the latest Cummins specification. The supplier identified a single batch consisting of 350 hoses had been produced on the overflow line using the incorrect crimp specification and was shipped to Cummins Rocky Mount Engine Plant on 8/17/2023. A warranty search identified 20 warranty claims with failure dates between 11/27/2023 and 12/3/2024. 1/10/2025 - Based on the results of the investigation, Cummins determined the subject hoses contained the same defect as prior recalls and decided to conduct a safety campaign to address this condition. To date, there have been no reports of fires, accidents, or injuries related to this issue.

Notification schedule

Dealer notification

Feb 09, 2025 - Feb 09, 2025 No Dealers

Owner notification

Mar 11, 2025 - Mar 11, 2025 Phased Recall

Documents (21)