NHTSA Office of Defects Investigation
Preliminary Evaluation PE25-003: Compressed Natural Gas (CNG) Fuel Leak
- Open
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE25-003 on March 28, 2025; NHTSA's investigations file listed it as open on October 23, 2026. NHTSA's investigations file lists 3 models from 3 makes for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE25-003 (also written PE25003)
- Investigation type
- Preliminary Evaluation The first stage of most defect investigations: NHTSA's Office of Defects Investigation gathers basic information about a possible safety defect, including from the manufacturer.
- Status
- Open since March 28, 2025
- Opened
- Vehicle or equipment manufacturers
- Luxfer Canada Ltd.; Luxfer Inc.; Natural Gas Fuel Systems, LLC dba CCFT
- Component
- Fuel System, Other — Storage — Tank Assembly
- Vehicles and equipment
- 3 models from 3 makes, including the Cummins Clean Fuel Tech CNG Fuel System and Luxfer Canada Type 4 CNG Cylinder
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Preliminary Evaluation PE25-003.
try.vin does not copy NHTSA's investigation documents; NHTSA's investigation record lists the ones NHTSA has published.
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.
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE25-003. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.
Cummins Clean Fuel Tech
Cummins Clean Fuel Tech CNG Fuel System
- model year not given
Luxfer Canada
Luxfer Canada Type 4 CNG Cylinder
- model year not given
Luxfer GAS Cylinders
Luxfer GAS Cylinders Type 4 CNG Cylinder
- model year not given
What an NHTSA investigation is
NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.
An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.
To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE25-003
Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.