How to Check the Production Date of Vehicle Glass?
2 Answers
Method to check the production date of vehicle glass: There is a code in the lower left or lower right corner of the window glass. The last or second-to-last row contains a number and several small black dots, which indicate the production date of the glass. The number represents the production year of the glass, specifically the last digit of the year, while the small black dots indicate the production month. Some new cars may have inconsistent production dates for their glass, such as the left and right rear windshields having different production months. In fact, it is common for vehicle assembly to involve glass with varying production dates. The vehicle assembly plant is a production facility where parts are prepared in advance, and it is not always possible to ensure immediate assembly. Therefore, achieving synchronization in timing is often difficult.
I've driven quite a few cars and know that the production date of glass can be found by looking at those small markings in the corners. They're usually located at the bottom left or right of the windshield, and sometimes on the side windows. The markings appear as a combination of dots, numbers, or letters. Here's a simple rule: the numbers represent the year, and the dots represent the month. For example, ••20 means October 2020, because each dot stands for a month, and two dots indicate the tenth month. The exact position varies, so you might need to crouch down and look carefully. If the lighting is poor, use your phone's flashlight. Don't worry about it being too technical—almost all cars have this. If you can't find it, try checking another piece of glass or inspect both the front and rear glass, as production dates can differ. Remember to check when the car is parked for safety. Mastering this method is quite useful for determining whether the car parts are original.
