How to Check the Production Date of New Car Windows?
3 Answers
Car window production dates are usually marked in the lower right corner of the window or below the trademark. More information about window production dates is as follows: 1. The window production date is in the form of numbers + dots, where the number represents the year and the dots represent the month. Dots in front of the number indicate the first half of the year, and the month can be calculated by subtracting the number of dots from 7. Dots behind the number indicate the second half of the year, and the month can be calculated by subtracting the number of dots from 13. 2. During vehicle assembly, it is common for the production dates of car windows to be inconsistent. The vehicle assembly plant is a production facility where parts are prepared in advance, making it difficult to synchronize timing. Additionally, different batches of car windows may have different production dates.
There's actually a little trick to check the production date of your new car's windows. I looked into this when I picked up my car. Just find a string of dotted codes in the corner of the window glass. For example, seeing '2•' means 2022, followed by dots representing the month. Count the dots on the left by subtracting from 7, and directly count the dots on the right. For example, '2•...' means March 2022 (7-4=3). Remember to check the windshield, door windows, and rear windshield – the dates should be close but not exactly the same. If all glass dates are within three months before the car's production date, it's generally normal. If there's a gap of over six months, you should ask the dealership. Especially for stock cars, check carefully as it relates to the warranty period of the car glass.
Here's a simple method to check the window date: crouch down and look for the small characters at the corner of the glass. The last four digits and black dots indicate the date. For example, '20..' on my car means November 2020 (7 minus the 2 dots in front equals 3, plus the 5 dots behind makes 8 months? Wrong. The calculation for dots after the number is the absolute value of the left dots minus 7. By the way, replaced glass will have a noticeably different date. I noticed this after my last glass repair. Remember to check all four door windows plus the front and rear windshields. The normal date difference should be within three months. If you find one significantly older, it might have been replaced. Bring a flashlight when picking up the car for the clearest view.
