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README.md
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---
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license: cc-by-4.0
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language:
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- en
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pretty_name: "NHTSA Defect Investigations - Tracked US Vehicles"
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tags:
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- automotive
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- vehicles
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- nhtsa
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- defect-investigations
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- odi
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- recalls
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- vehicle-safety
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- open-data
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size_categories:
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- n<1K
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configs:
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- config_name: default
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data_files:
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- split: train
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path: nhtsa-investigations.csv
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---
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# NHTSA Defect Investigations
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Every NHTSA Office of Defects Investigation (ODI) action touching a tracked vehicle — open and historical. The leading indicator of a recall: a Preliminary Evaluation (PE) can escalate to an Engineering Analysis (EA) and then a recall. Includes the recall campaign number for investigations that became recalls.
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## Columns
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| column | meaning |
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|---|---|
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| `action_number` | NHTSA investigation ID (prefix = type) |
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| `type` | PE \| EA \| RQ \| DP \| AQ — investigation stage |
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| `status` | open \| closed, per the NHTSA record |
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| `make` | Manufacturer (blank if it spans multiple makes) |
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| `model` | Model (blank if it spans multiple models) |
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| `year_start` | Earliest affected model year in our fleet |
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| `year_end` | Latest affected model year in our fleet |
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| `component` | NHTSA component under investigation |
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| `opened` | Investigation open date |
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| `closed` | Close date (blank if open) |
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| `recall_campaign` | NHTSA recall campaign # if it led to a recall |
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| `nhtsa_url` | Official NHTSA record |
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## Source & methodology
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Parsed from NHTSA’s ODI investigations flat file (FLAT_INV) and matched to our vehicles by year/make/model. One row per NHTSA action number. "status" is open when the federal record carries no close date; "recall_campaign" holds the NHTSA campaign number when the investigation led to a recall. An investigation is NHTSA examining a pattern — not a confirmed defect.
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Canonical version, full methodology, and the other datasets: **https://problemsbyvin.com/data/** .
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## License
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CC BY 4.0 — free to use with attribution to **ProblemsByVin (https://problemsbyvin.com)**.
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