T21
Service Bulletin/Repair Instructions
Emissions Recall T21 Reprogram Engine Control Unit
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.
T21
Emissions Recall T21 Reprogram Engine Control Unit
T21 Rev3
Emissions Recall T21 Reprogram Engine Control Unit
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.