What type of document provides updates on known vehicle problems?

The correct answer, a Technical Service Bulletin (TSB), provides updates on known vehicle problems. TSBs are issued by manufacturers and serve as official communications to dealerships and service centers about specific issues that have been identified in vehicles. These bulletins often include detailed information on symptoms, possible causes, and recommended solutions or repairs. TSBs may address defects, recurring issues, or updates related to vehicle systems, helping technicians effectively diagnose and remedy problems that may affect vehicle performance or safety.

In contrast, a warranty guide primarily outlines the coverage and terms of the vehicle's warranty, while an insurance policy pertains to protection against loss or damage and does not focus on mechanical issues or updates regarding known vehicle problems. An owner's manual provides general information about operating and maintaining the vehicle but is not designed to offer ongoing updates about problems identified after the vehicle's release. Therefore, TSBs are the best resource for service professionals when it comes to staying informed about known issues and recommended repairs for vehicles.