Get a List of Car Model Years for a Specific Car Make/Model: You can get the entire list of car model years or use some basic filters to return the array of car model years you’re interested in for a specific car make/model.
Get Details on a Specific Car Make/Model/Year: Returns relevant information for a specific car make/model/year, including the car styles and trims. The information can also be narrowed down with filters.
These three endpoints provide all the necessary data points.
https://api.edmunds.com/api/vehicle/v2/lexus/rx350/years?fmt=json&year=2011&api_key={api key}
https://api.edmunds.com/api/vehicle/v2/honda/accord/2009?fmt=json&api_key={api key}