How We Process the Data

1. Download NHTSA ODI complaint database and parse by vehicle year, make, and model
2. Download recall campaign data via NHTSA API and organize by model
3. Download NCAP crash test ratings and join to vehicle model profiles
4. Aggregate complaint counts by component failure category (engine, brakes, airbags, etc.)
5. Build per-model profiles showing complaint trends, recall history, and safety ratings in one place
6. Load into our search-optimized database

What the Data Shows & Doesn't Show

Complaint tallies, crash counts, and injury figures are presented exactly as consumers reported them to NHTSA. We do not adjust these numbers, assign our own reliability scores, or editorialize. High complaint counts may reflect a popular vehicle with a large fleet size as much as they reflect genuine defect rates.

A vehicle with zero NHTSA complaints is not necessarily safer than one with complaints — it may simply be less popular, newer, or have lower NHTSA reporting awareness among owners. Fleet size matters significantly: a model with 500,000 units on the road will naturally generate more complaints than one with 50,000 units, even if both have identical defect rates per vehicle.

Data Currency

NHTSA ODI complaints are updated daily. Recall data is refreshed via the NHTSA API. NCAP ratings are updated when NHTSA publishes new crash test results. We update our database regularly to reflect the latest NHTSA data.

Limitations

• Complaint data is consumer-reported and not independently verified by NHTSA or PlainCars
• High complaint counts do not prove a defect — many complaints are closed without a finding of safety issue
• Not all recalled vehicles have been repaired — check NHTSA's VIN lookup for recall status of a specific vehicle
• This data is for informational purposes only — always check NHTSA.gov for the most current information

How the Source Agency Collects Data

NHTSA's Office of Defects Investigation (ODI) operates a public complaint system where vehicle owners can submit safety-related complaints through NHTSA's website, hotline (1-888-327-4236), or by mail. Each complaint is entered into the ODI database with details about the vehicle, component involved, failure description, and whether the issue caused a crash or injury. NHTSA uses complaint patterns to identify potential safety defects and initiate investigations that may lead to safety recalls.

Recall campaigns are initiated when NHTSA or the manufacturer determines that a safety-related defect exists. Manufacturers are required to notify NHTSA, vehicle owners, and dealers, and to provide a free remedy. NCAP crash test ratings are produced by NHTSA through controlled laboratory crash tests conducted at certified facilities using standardized test protocols.

Data Accuracy Commitment

PlainCars presents NHTSA data without modification or editorialization. Complaint counts, recall details, and crash test ratings are displayed exactly as published by NHTSA. We do not compute our own reliability scores or make determinations about vehicle safety beyond what the data directly shows. If you find any data that appears incorrect, please contact us and we will verify against the NHTSA source records.

How Content Is Produced

Data pages — complaint tallies, recall summaries, crash test ratings — are generated directly from NHTSA sources via a continuous editorial pipeline, with no hand-entry of the underlying numbers. Guides, methodology, and explainer pages are written from that source data following our documented editorial standards, set out in our editorial & corrections policy. When a reader reports an error, we verify it against the NHTSA record and, if it is ours, fix it at the data layer so every affected page is corrected at once.

Contact

Questions about our methodology or found a data error? Reach us at hello@plaincars.com or through our contact page.