NHTSA Office of Defects Investigation
Preliminary Evaluation PE21-008: Fuel Injector Leak
- Closed
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE21-008 on March 29, 2021 and closed it on October 3, 2022. NHTSA's investigations file lists the Volkswagen Atlas and Atlas Cross Sport for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE21-008 (also written PE21008)
- 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
- Closed October 3, 2022
- Opened
- Closed
- Vehicle or equipment manufacturer
- Volkswagen Group of America, Inc.
- Components
- Fuel System, Gasoline; Fuel System, Gasoline — Fuel Injection System — Injectors
- Vehicles and equipment
- Volkswagen Atlas and Atlas Cross Sport
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 Preliminary Evaluation PE21-008.
On March 29, 2021, the Office of Defects Investigations (ODI) opened PE21-008 to investigate instances of fuel injectors leaking in the engine compartment in model year (MY) 2018 through 2020 Volkswagen Atlas and Atlas Cross Sport SUVs. These vehicles are equipped with either a 3.6 or 2.0 liter engine. The subject investigation concerns vehicles equipped with 3.6L engines. Prior to opening the investigation, ODI also observed that warranty data for the fuel system from TREAD reporting was an outlier for the MY 2018 Atlas.
The allegation involved fuel injectors leaking fuel near engine compartment components that operate at high temperatures. Consumers allege a fuel leak, fuel odor, and/or an illuminated check engine malfunction indicator light (MIL) on that alerts them to the condition. Fuel leaking in the engine compartment has a higher potential risk of fire as nearby components are operating at higher temperatures compared to other areas of the vehicle. No fires have been connected to this issue to date.
The 3.6L engine is a VR6 type engine. Due to its specific design, the VR6 has two types of injectors with different designs installed. Cylinders 1, 3, and 5 use long injectors and cylinders 2, 4, and 6 use short injectors. Unlike the short injectors, the long injectors require an extension pipe necessary to reach cylinders 1, 3, and 5. Volkswagen stated that the potential root cause for a leaking injector is typically either a damaged, misaligned, or missing supporting ring or a damaged O-ring. These rings assist in connecting the injector to the extension pipe. If one of these conditions is present in a vehicle, the O-ring has difficulty withstanding fuel pressure over time.
Volkswagen stated that an analysis of warranty data related to leaking injectors in vehicles equipped with 3.6L engines showed that the vast majority of leaking allegations were related to internal leaks. Fuel can leak into the cylinder causing misfiring in the affected cylinders. This condition would not cause fuel to enter into the engine compartment. Volkswagen states that these internal leaks pose no unreasonable risk to motor vehicle safety.
Analysis of all relevant data indicates that the subject condition is an early-life failure with a relatively low failure rate. The average failure mileage calculated from all data sources was determined to be approximately 14,000 miles. Only two failures were reported outside of the vehicles' warranty coverage period. The average time to failure for the subject vehicle population is approximately 12 months in service (MIS). The majority of failures were below the average of 14,000 miles or 12 MIS. Analysis of reported failures showed that the failure rate is approximately 0.08% or 0.8 incidents per thousand vehicles (IPTV).
To date, there have been no reported fires, crashes, injuries, or fatalities related to this issue. In view of the low rate of failure, the nature of early-life failure, and low potential hazard to drivers, this Preliminary Evaluation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency reserves the right to take additional action if warranted by new circumstances.
Review the ODI reports cited above at nhtsa.gov under the following identification numbers:11446833, 11438403, 11382958, 11298402, 11291955, 11218819, 11218780
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE21-008. 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.
Volkswagen
All Volkswagen recallsWhat 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.
Volkswagen VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE21-008
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.