The company said that it adopted a different trunk harness design when it ended the MY (model year) 2020 production – something Tesla does not disclose and a concept most people thought it didn’t even work with. This change would have happened on September 30, 2020.
However, the company did not explain why the trunk harness design changed. Would Tesla have diagnosed the issue, fixed it on the MY 2021 Model 3, and decided to recall these cars only now? The official chronology of the defect states that the problem was only detected in June 2021. If that is really the case, it would be enlightening to understand why it changed for the MY 2021.
To explain the problem, Tesla states that “the coaxial cable is affixed to a harness on the trunk lid and extends or folds as the trunk opens and closes. When the trunk is in a closed state, the harness folds and may experience a tight bend radius, stressing the core of the cable.”
To fix it, Tesla will inspect these vehicles and check if the coaxial cables are still in good shape. If they are, the company will install a guide protector in the trunk harness “to ensure a sufficient radius when the harness holds in a closed trunk state and prevent further wear.” If they are already broken, Tesla will replace the coaxial cables and install the guide protector.
Tesla Service Centers should have been performing this repair since December 23. With the amount of work they already have, coping with 356,309 more cars all of a sudden tends to make things even more difficult for them. At least Tesla is doing the right thing in this case, right?