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.
SF-388A-F
DAIMLER/FREIGHTLINER: HORTON FAN HUB CENTER SHAFT BOLTS. CERTAIN VEHICLES MAY HAVE BEEN BUILT WITH HORTON FAN HUB ASSEMBLIES THAT HAVE INSUFFICIENT THREAD DEPTH ON THE CENTER SHAFT BOLTS. THIS MAY CAUSE THE SHAFT BOLTS TO BREAK. *PE
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.