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.
14-203
THIS ADVISORY 14-203 INVOLVES MONTANA MOUNTAINEER FW UNITS MANUFACTURED WITHOUT A POWER SOURCE TO ALLOW 120 VOLT FUNCTION OF THE WATER HEATER. THIS SERVICE ADVISORY EXPLAINS THE CHANGES TO CORRECT THE WIRING.
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.