NHTSA Complaint #11623084 — 2024 KENWORTH T680

Driver seat back is defective and will not support driver properly. The seat back will bend and twist if pressure is applied to it. Putting the driver in an unsafe driving position where the torso is contorted. Four out of four trucks have the same issue with this OE seat. There is no advance warning of when the seat will fail. The issue has been discussed with Kenworth and no resolution has been found as of this time. We have four tractors that are having this same issue, the corresponding VIN numbers are: [XXX] , [XXX] , [XXX] , [XXX] . With the issue occurring on all four of our trucks, we believe this is not an isolated issue and is common with this OE seat. The defect has occurred under light use with no involvement in an accident, which leads to the belief that in an actual emergency it would fail completely. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)