021218
Service Bulletin/Repair Instructions
ON SOME VEHICLES, OPERATING AT HIGH ALTITUDES, THE CHARGE AIR COOLER TEMPERATURE TENDS TO CAUSE THE VISCOUS FAN DRIVES TO ENGAGE LATE OR AT HIGHER COOLANT TEMPERATURES. *TT
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.
021218
ON SOME VEHICLES, OPERATING AT HIGH ALTITUDES, THE CHARGE AIR COOLER TEMPERATURE TENDS TO CAUSE THE VISCOUS FAN DRIVES TO ENGAGE LATE OR AT HIGHER COOLANT TEMPERATURES. *TT
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.