ITS61914
Service Bulletin/Repair Instructions
Instructions to reorient oxygen sensor harness on Cummins LN9 engines to prevent harness chaffing.
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.
ITS61914
Instructions to reorient oxygen sensor harness on Cummins LN9 engines to prevent harness chaffing.
ITS61591
Instructions to verify steering column shaft collar pinch bolt installation.
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.