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.
MI26-00
The gasket thickness was increased from 1.5 mm to 3 mm to prevent interference between the collar ends, which previously made it impossible to reach the specified tightening torque. Increasing the gasket thickness ensures sufficient clearance between the collar ends and thus guarantees optimal tightening.
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.