Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SB-26-32-001
Service Bulletin/Repair Instructions
On some Semi, the steering gear to reservoir return hose clamp may have loosened over time which may cause steering fluid leakage from the reservoir. Inspect the vehicle for symptoms related to the condition. If symptoms are present, replace the steering gear to reservoir return hose clamp with an updated part.
SB-25-39-001
Service Bulletin/Repair Instructions
Updated oil pumps that provide improved oil flow are available for the Torque Drive Unit (TDU) and Efficiency Drive Unit (EDU) on Semi. Replace the TDU and EDU oil pumps with updated parts.
SB-25-17-007
Service Bulletin/Repair Instructions
Some Semi trucks are equipped with a windshield washer nozzle that may not meet Tesla specifications. While adequate in suppling washer fluid to the windshield, affected washer nozzles may restrict washer fluid output and increase the amount of wiper cycles needed to remove debris and contaminates.
SB-24-15-004
Service Bulletin/Repair Instructions
On certain Semi, when the LH cabin door is repeatedly closed with a high amount of force, the fire extinguisher bracket might loosen over time.