NHTSA Vehicle Recalls
NHTSA safety recalls by model year, make and model with component, consequence and remedy

Owner complaints, recalls and failure-mileage statistics by vehicle make, model and year.
ProblemsByVin API is a free Vehicle API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Free, downloadable datasets derived from 78,000+ NHTSA owner complaints and 4,900+ recalls: failure-mileage quartiles, post-warranty failure patterns, recall gaps, and engine/transmission complaint density. CSV + JSON, CC BY 4.0.
Details from problemsbyvin.com.

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NHTSA safety recalls by model year, make and model with component, consequence and remedy
Lock and unlock vehicles and get data like odometer reading and location. Works on most new cars
Telematics data, remotely access vehicle functions, car configurator, locate service dealers
The ProblemsByVin API is provided by ProblemsByVin (problemsbyvin.com). Free, downloadable datasets derived from 78,000+ NHTSA owner complaints and 4,900+ recalls: failure-mileage quartiles, post-warranty failure patterns, recall gaps, and engine/transmission complaint density. CSV + JSON, CC BY 4.0.
Yes. The ProblemsByVin API is listed in the Vehicle category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The ProblemsByVin API requires no authentication, so you can start making requests without signing up.
Yes. The ProblemsByVin API supports CORS, so front-end JavaScript can call it directly.
Yes. The ProblemsByVin API is served over HTTPS, so it's safe to use in production.