What do technical service bulletins explain?

Technical service bulletins (TSBs) are critical documents issued by automotive manufacturers that focus on mechanical and structural problems in vehicles. These bulletins inform technicians about specific issues that have been identified in certain vehicle models, including how to diagnose and repair these problems effectively. They serve as a valuable resource for automotive professionals to understand recurring issues, recommended repair procedures, and any updated parts or tools necessary to address the identified concerns.

The other options do not capture the primary purpose of TSBs. While cost calculations for repairs, paint application techniques, and welding instructions are essential aspects of auto body work, they are typically covered in different technical documents or manuals rather than TSBs, which are specifically geared towards addressing major mechanical and structural issues and ensuring that repairs are performed to the manufacturer's standards.