Technical Service Bulletins, or TSBs, document recommended procedures for repairing vehicles and are issued by the series Technical Department when there are several occurrences of an unanticipated problem.
TSBs can range from vehicle-specific, to covering race inspired improvements and upgrades where the specified repair is a step-by-step process. While some issues addressed will cover a technical process change, certain problems may have more than one cause and therefore often there is sometimes more than one way to fix a problem.
This may result in multiple TSBs for the same problem. TSBs may have multiple reference names for different things. All TSBs must be approved by the E36 Race Series Committee Members.