The factory time of the car glass itself
There are important clues to the identity of the car on the glass. The first is the factory time of the glass itself. The algorithm is very simple:
". 8", 8 represents the year, which is 2008.
●The black dot is before "8", indicating production in the first half of the year. The calculation formula "7-number of black dots" means that the car glass is 7-1=6, so this piece of glass should be in 2008 6 Monthly production;
●The black dot after "8" indicates production in the second half of the year. The calculation formula is "13-number of black dots", such as "8..", indicating that the car glass is 13-2= 11. This piece of glass should have been produced in November 2008;
VIN number on the car windshield
There is a vehicle VIN number on the lower corner of the glass on the driver's side.
When buying a second-hand car, you should remember the 10th digit of the code, which represents the factory date of the vehicle, W represents 1998, X represents 1999, 1 represents 2001, 2 represents 2002... one for 30 years Reincarnation...
There is also a corresponding VIN code on the driving license, and the two must be consistent.
Xiao i reminds car owners that when buying a second-hand car, these small details cannot be ignored. Theoretically, there should not be a big difference between the date of manufacture of the glass and the time of manufacture of the vehicle (within half a year is within the normal range). If the difference between this data and the data on the glass is 2 years or more, then you have to think about it again~
Understand the logo on the car glass
Look at the logo identification certificate, which is commonly known as the "square and circle logo", which is also the most common logo on the car glass.
Foreign certification marks, such as the "DOT" mark in the United States and the "E" mark of European ECE, indicate that the product has also been certified by these foreign certification agencies and can be exported abroad.
The "DOT" mark in the United States
The "E" mark of European ECE
A simple way to identify the authenticity of car glass
Look at the trademark : The trademark fonts of real glass are clear and even. If the replacement is inferior glass and the label is sprayed on, the fonts and patterns will look rough.
Look at the edge grinding: The original glass will be edged around, making it look more beautiful and less prone to edge bursting. The replacement glass may have rough edges and uneven edges. Laminated glass The PVB film between them will be squeezed out.
Look at the tape: Check whether the glass tape is flat. If it is uneven, the glass may have been replaced.
Mirror holder: The interior rearview mirror of most cars is installed on the front windshield. When replacing the glass, you need to remove the mirror holder and stick it on the new glass with special glue. Pay more attention.
Look at the frame number: The original frame number plate will be just square and embedded in the exposed position, but after replacing the glass, it is basically impossible to embed it back into the original position.
Look at the gap between the glass and the A-pillar: The glass is mechanically installed during car production, and the gaps on both sides are almost exactly the same. However, manual replacement in the later period cannot avoid distance errors.
In short, you can tell whether this second-hand car is worth buying by looking at the glass!