NHTSA opens probe into Cummins Clean Fuel Tech, Luxfer Canada and Luxfer GAS Cylinders vehicles: Compressed Natural Gas (CNG) Fuel Leak
On March 28, 2025, the National Highway Traffic Safety Administration’s Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE25003) into Cummins Clean Fuel Tech, Luxfer Canada and Luxfer GAS Cylinders vehicles, concerning the fuel system, other. A Preliminary Evaluation is the first formal stage of an NHTSA defect investigation: ODI gathers information from the manufacturer and from owner reports to decide whether to close the case or take it further. As of NHTSA’s latest data it is still open.
- Action
- PE25003 (Preliminary Evaluation)
- Status
- Open
- Component
- Fuel System, Other: Storage: Tank Assembly
- Listed
- 3 make/model/year entries in NHTSA’s file
Vehicles under investigation
| Makes | Cummins Clean Fuel Tech, Luxfer Canada, Luxfer GAS Cylinders |
|---|---|
| Models | CNG Fuel System, Type 4 CNG Cylinder |
As listed in NHTSA’s investigation file. Not every vehicle of a listed model is necessarily affected.
What ODI says
The Office of Defects Investigation (ODI) received a complaint alleging a compressed natural gas (CNG) fuel leak from a Luxfer Type 4 CNG 60 diesel gallon equivalent (DGE) 26x108 size fuel container. The container was used in a system built and installed by Natural Gas Fuel Systems, LLC, dba Cummins Clean Fuel Technologies (CCFT). A strong odor alerted the driver of the fuel leak, which occurred at a fracture at the fuel container's threaded aluminum alloy fixed end boss. The fuel container is positioned longitudinally within an enclosure structure that is attached to the truck's passenger side frame rail in a side-mount configuration. The fuel container is held in position relative to the enclosure structure via neck mounting blocks and two aluminum alloy end bosses, each at opposite ends of the fuel container. The threaded fixed end boss is securely held in position, while the other floating end boss has some degree of freedom to allow for normal expansion and contraction with internal pressure and temperature changes. The complainant reports they are aware of five other trucks purchased by other customers from the same dealership that have experienced the same alleged condition. Furthermore, previous discussions with CCFT have revealed that they are also aware of other similar incidents. A fuel leak in the presence of an ignition source may result in a fire or explosion. To better understand the frequency, severity and scope of the allegedcondition, a Preliminary Evaluation (PE) is being opened. To review the ODI report number cited in the Opening Resume ODI Report Identification Numbers document, go to NHTSA.gov.
Official summary by NHTSA’s Office of Defects Investigation for PE25003, quoted in full (U.S. government work, public domain).
Timeline
- ODI opens preliminary evaluation PE25003
- OpenNo closing date yet
What this means for owners
- An investigation is not a recall. NHTSA has not made a defect finding here, and owners are not asked to do anything yet. If a safety defect is confirmed, the manufacturer recalls the vehicles and the repair is free.
- Check your vehicle for open recalls with a free VIN recall check.
- Had this problem? File a complaint with NHTSA. Owner complaints are the evidence ODI uses to open and expand investigations.
Official record: search PE25003 or your vehicle at NHTSA.gov/recalls, which lists investigations alongside recalls. Data: NHTSA ODI investigations file, updated daily. All NHTSA investigations.