Vehicle report
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.
FRT306
PROBLEMS MAY OCCUR WITH THE WILLIAMS CONTROLS THROTTLE PEDAL ASSEMBLIES USED ON DETROIT DIESEL DDEC III ENGINES (SPECIFICALLY WITH THROTTLE PEDAL POSITION SENSORS MANUFACTURED SINCE JULY 1994): THE ENGINE RETARDER MAY NOT ALWAYS ENGAGE. THE ENGINE MAY INTERMITTENTLY IDLE AT A SLIGHTLY ELEVATED RPM. *SD
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.