Sources familiar with those changes confirmed to Electrek that they had to make over a half dozen of them. In most cases, the vehicles are still performing normally, but Tesla wants to replace a now “prototype” part with a production one or it has improved on a production part through the deployment of the Model 3 manufacturing lines.
Tesla replaces Model 3 headlights, battery, seats, and more while going through ‘production hell’
So much for that supplier vetting process.