Which document is best for researching vehicles of the same year, make, and model with similar issues?

The best document for researching vehicles of the same year, make, and model with similar issues is the Technical Service Bulletin (TSB). A TSB is a communication issued by manufacturers to inform technicians and dealers about potential problems with specific vehicle models, including known issues, diagnostics, and repair procedures. They are invaluable for identifying patterns in vehicle complaints and can provide insight into common problems that many owners may face with their vehicles.

The other documents mentioned serve different purposes. The Environmental Protection Agency (EPA) focuses on environmental regulations and vehicle emissions standards, which would not assist in diagnosing specific vehicle issues. The Occupational Safety and Health Administration (OSHA) is concerned with workplace safety regulations, not automotive issues. Safety Data Sheets (SDS) provide information on hazardous substances but are not relevant to researching vehicle problems. Therefore, TSBs are specifically tailored for diagnosing and resolving issues with vehicles, making them the most appropriate resource in this context.