How much difference in production dates between new car windows is considered normal?

[DiMax]

New car windows with production dates differing by 2-3 months is considered normal. Below are specific methods to check if the windows have been replaced: 1. Manufacturer: The manufacturer code on the window can indicate which company produced the window. Generally, car manufacturers purchase windows in bulk and do not use too many brands or the same brand from different production locations. 2. Window production date: If there is a significant difference in the production dates of the windows on the same car, it may indicate that the car has been refurbished or the windows have been replaced later. 3. Window label: If a car window has been replaced, the label on the new window will be significantly different from the original factory label.