B21007
Service Bulletin/Repair Instructions
Walmart has reported, that in their operation, they are seeing the horizontal door track flexing outwardly resulting in the roller and (in some instances) the door panel falling out of the track.
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.
B21007
Walmart has reported, that in their operation, they are seeing the horizontal door track flexing outwardly resulting in the roller and (in some instances) the door panel falling out of the track.
B20011
installation of a heat shield on certain reffer trailers
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.