Why are the production dates of the new car's windows different?

[McColin]

It is normal for the production dates of car windows to be different. The vehicle assembly plant is an assembly factory, and parts suppliers deliver goods to its warehouse in advance. It is impossible to ensure that every part is assembled immediately, and sometimes it is normal to have some extra parts prepared in advance, so the timing may not be synchronized. The glass production is a continuous assembly line that basically cannot be stopped, and different batches of glass will have different production dates. Installing glass with different production dates on the same car does not indicate any other issues with the vehicle. Since car windows cannot be perfectly identical, this has no direct relation to whether the car itself has any problems. If there are quality issues with the glass, such as cracking, the inconsistent production dates can serve as valid evidence of glass quality. However, this does not prove any issues with the car itself, and the vehicle warranty is based on the vehicle's sales date. Generally, the vehicle production date is indicated on the nameplate of the front passenger door.