VinFast preliminary evaluation PE24025
Lane Keep Assist System. NHTSA’s Office of Defects Investigation opened this preliminary evaluation about the automatic steering on 2 model years (2023–2024). Opened Sep 10, 2024, closed Oct 21, 2025 after 13 months. It led to safety recall 25V559000. became a recall
What NHTSA says
Source: Office of Defects Investigation, as filedOn September 10, 2024, the Office of Defects Investigation (ODI) opened Preliminary Evaluation (PE) 24025 to assess allegations of lane departures with the Lane Keep Assist (LKA) system engaged in Model Year (MY) 2023 through 2024 VinFast VF8 vehicles. The reports further alleged that the system exhibited difficulty detecting lanes on the roadway and, under certain conditions, provided improper steering inputs that resulted in an inconsistent control effort required by the driver, potentially elevating the risk of a crash or injury. To date, ODI has received a total of 17 related Vehicle Owner Questionnaires (VOQ) of the LKA system in the subject vehicles. As a part of the investigation, NHTSA’s Vehicle Research and Test Center (VRTC) replicated the VOQ- reported conditions in a MY 2024 VinFast VF8. VRTC documented that two conditions within the MY 2024 VinFast VF8 LKA system may induce the vehicle to deviate laterally outside of the intended travel lane when navigating sweeping roadway curves. First, during sweeping turns, the steering wheel force required may abruptly change mid-turn, altering the steering wheel force equilibrium between driver input and roadway force, potentially causing the driver to unintentionally steer excessively leading vehicle to cross over its lane boundaries. Second, the LKA system may apply steering inputs to maintain the curve that move the vehicle toward the inside lane line and, in some cases, across the lane boundary, increasing the risk of a collision. On August 27, 2025, VinFast filed NHTSA Recall No. 25V-559 to address the safety-related defect in the LKA system. This recall consists of a software update that is intended to refine the system’s steering control and improve the overall driving smoothness. Specifically, the software update will: (i) reduce steering wheel vibration during the activation of the vehicle’s advance driver-assistance system (ADAS); (ii) make it easier for the driver to override the ADAS; and (iii) smooth the transition between an active and inactive LKA system, so that driver inputs deactivating the system may not cause unintended vehicle maneuvers. Because this recall action is taken by VinFast, ODI is closing PE24025. NHTSA reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov. The opening resume identified VOQ #11585817 as a fatal crash involving a vehicle roadway departure at high speed. ODI’s analysis found the crash conditions are not consistent with those observed during VRTC testing for this investigation. The subject vehicle’s Event Data Recorder (EDR) sustained fire damage during the collision, rendering the recorded data inaccessible at this time. ODI has no evidence linking this crash to the LKA behavior identified in PE24025 and will continue to monitor for any additional information that might warrant further assessment of this incident.
A Preliminary Evaluation is the first formal stage: NHTSA has decided the complaints and other information it screened are worth a closer look, and asks the manufacturer for its own data on the condition. The summary is the agency’s own text from its investigation file, unedited; the resumes carrying the full reasoning are linked below.
The paperwork NHTSA filed
Source: every document on this action, at nhtsa.gov- Opening resume — ODI’s own summary of why it opened this — the subject, what prompted it, and the vehicles in scope.
- Closing resume — ODI’s own summary of why it closed this, and what it concluded.
| Document | Code | Filed | At NHTSA |
|---|---|---|---|
| Opening resume | INOA | 2024 | |
| Closing resume | INCLA | 2024 | |
| Information request to the manufacturer | INIM | 2024 | |
| Memo granting a response extension | INRE | 2024 | |
| Filed document | INOV | 2024 | |
| Filed document | INCV | 2024 |
These are NHTSA’s own files, served from the agency’s site — the resumes are what ODI wrote when it opened and closed the action, and the rest is the correspondence behind them, including what the manufacturer sent when the agency asked. They are linked, not copied: where a document names the people who wrote in, that redaction is the agency’s to make and its copy is the one you should read.
What owners had already reported
Source: complaints on file the day it openedWhen NHTSA opened this on Sep 10, 2024, owners had filed 56 complaints with the agency about the model years above, of which 17 named the lane departure NHTSA went on to investigate. Owner complaints are the agency’s main early signal: ODI screens them, and a Preliminary Evaluation is usually where a pattern in them ends up.
This is what the complaint file held on that date, not a claim about which reports prompted the investigation — NHTSA’s complaint records carry no investigation number, so nobody can make that link from the data alone. The opening resume linked above names the reports ODI itself cited. Complaint records on this site begin with 2016.
What this means for an owner
Source: and what happens nextAn investigation is not a finding that a defect exists, and it puts no duty on anyone. NHTSA opens a Preliminary Evaluation when complaints and other reports suggest a condition worth asking the manufacturer about; it upgrades to an Engineering Analysis when the answers warrant testing; it closes either when it recommends a recall, when the manufacturer recalls on its own, or when no defect trend is found. The agency’s own goals are about four months for a petition, eight for a Preliminary Evaluation or a Recall Query and eighteen for an Engineering Analysis; many run longer.
This one became a recall. The campaign page carries the manufacturer’s filed defect, risk and remedy, the build window and every model year covered; whether one specific vehicle is included is settled by VIN at nhtsa.gov/recalls.
Model years it names
Source: as NHTSA filed themA vehicle page’s investigation list carries the same action; a name here is the scope NHTSA opened, not a list of affected VINs.
Common questions
Source: NHTSA Office of Defects InvestigationIs PE24025 a recall?
No — it is the investigation that led to one. Recall 25V559000 is the campaign; its page carries the remedy.
Is PE24025 still open?
No. It closed on Oct 21, 2025 and led to recall 25V559000.
Which vehicles does PE24025 cover?
NHTSA opened it on 2 model years: 2024 VinFast VF 8, 2023 VinFast VF 8. That is the scope of the inquiry, not a list of affected vehicles; a recall, if one follows, defines its own population by VIN.