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.
TSB-15-310-002
SPARTAN MOTORS: SOME MOTOR HOME CHASSIS ARE EXPERIENCING A FUEL TANK DEFORMITY AND FUEL SENDER BY SHOWING LESS FUEL ON FUEL GAUGE THAN IN FUEL TANK AND WOULD NEED TO HAVE FUEL SENDER FLOAT ARM ADJUSTMENT. MODEL 2002-15 MM, K3, K2, NVS. *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.