NHTSA Office of Defects Investigation
Defect Petition DP18-001: Fuel Tank Retention Failure
- Closed
NHTSA's Office of Defects Investigation opened Defect Petition DP18-001 on May 23, 2018 and closed it on March 5, 2020. NHTSA's investigations file lists 3 models from 2 makes for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- DP18-001 (also written DP18001)
- Investigation type
- Defect Petition A petition asking NHTSA to open a defect investigation; NHTSA grants or denies it, and granting one opens an investigation.
- Status
- Closed March 5, 2020
- Opened
- Closed
- Vehicle or equipment manufacturers
- Isuzu Motors Limited; Honda (American Honda Motor Co.)
- Component
- Fuel System, Gasoline — Storage — Tank Assembly — Mounting
- Vehicles and equipment
- 3 models from 2 makes, including the Isuzu Rodeo and Isuzu Axiom
A recall appears here only when NHTSA's investigations file links one to the investigation; NHTSA's summary or record can name others.
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Defect Petition DP18-001.
try.vin does not copy NHTSA's investigation documents; NHTSA's investigation record lists the ones NHTSA has published.
On April 10, 2018, NHTSA received a petition from Mr. Kevin Byrne (the Petitioner) requesting that the Agency ?undertake a defects investigation? of ?rust-related detachment of Isuzu Rodeo fuel tanks? (NHTSA ID 11091788). The Petitioner experienced a partial fuel tank detachment in his model year (MY) 2004 Isuzu Rodeo in July 2017. On May 23, 2018, ODI opened DP18-001 to evaluate the Petitioner?s request for a defect investigation. ODI sent information request letters to Isuzu and Honda requesting production, design history and field data related to fuel tank retention failures in MY 2001-2004 Isuzu Rodeo, MY 2002-2004 Isuzu Axiom and MY 2001-2002 Honda Passport vehicles equipped with the same fuel tank shield part number as the Petitioner?s vehicle (the ?subject vehicles?). ODI notes that Isuzu manufactured the subject Passport vehicles for Honda. Isuzu implemented a change to the tank shield corrosion protection system as a running change in early MY 2002 production. Isuzu and Honda sold approximately 172,000 subject vehicles in the United States. Fifty-eight (58) percent of the subject vehicles were produced prior to the shield change (99,000) and 42 percent after the change (73,000).
ODI?s analysis of field data identified 19 incidents of partial fuel tank detachments in the subject vehicles. The incidents all occurred in states with high road salt usage in winter months (Salt States) and involved older vehicles beyond 10-years in service. On average, the failures occurred in the vehicle?s 13th year-in-service. Evidence of severe general corrosion in multiple undercarriage components was also noted in 13 of the 19 vehicles that experienced partial fuel tank detachments. None of the incidents resulted in fuel leakage or fire. Aside from the petitioner?s vehicle, ODI has not identified any other incidents of complete or partial fuel tank detachment in the MY 2002-2004 subject vehicles equipped with the modified retention shield.
In addition, ODI reviewed 24 NHTSA complaints alleging corrosion concerns with the fuel tank retention system in the subject vehicles that did not result in fuel tank detachment. Twenty-three (23) of these complaints involve subject vehicles built prior to the shield change. Like the vehicles reporting fuel tank detachments, these vehicles are also all from Salt States and, in most cases (20 of the 24 complaints), the vehicles also experienced severe corrosion concerns in other undercarriage components. Half (12 of the 24 complaints) of the vehicles show prior accident damage in their service histories.
Based on these analyses, ODI has not identified evidence of a defect trend for premature corrosion-related fuel tank detachments in the MY 2004 Isuzu Rodeo or similarly equipped vehicles. The damage that may result in tank retention concerns appears to occur progressively over many years with ample opportunity for detection and repair. Furthermore, ODI has not identified any crashes, fires, injuries, or fuel leaks associated with fuel tank retention failures in a population of vehicles that currently range from 16 to 19 years old.
Accordingly, the Agency is denying the petition.
A summary of ODI?s analysis of this petition will be published in the Federal Register and is also available in the investigative file for this action.
The NHTSA consumer complaints counted in the closing resume for DP18-001 can be reviewed at www.nhtsa.gov under the following ODI identification numbers (VOQs in parentheses denote duplicate records): Allegations of fuel tank retention failure: 11084098 (11091788), 10532845, 10486109. Allegations of fuel tank retention component corrosion: 11138931, 10992150, 10845523,
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Defect Petition DP18-001. 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.
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 DP18-001
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.