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Decoding Your Car’s Windshield

What Kind of Windshield Do I Have?


This permanent bug on your windshield is probably a bit different than what you have pictured. The automotive glass industry actually refers to the stamp pictured above as a “bug” or “monogram” which can usually be found on the bottom corner of your windshield. The bug provides pertinent information about the windshield, which can be helpful to both consumers and glass shops for looking up the windshield part number.

Why is it There?

If you’re going to have your windshield replaced soon, it may be beneficial to provide the glass shop with the information in the bug. Or if you recently had your glass replaced, you may want to confirm that the shop used quality glass. So what do all of these numbers and symbols mean?

What Does it Mean?

We’ll start with the most obvious—this glass is for a Nissan and is most likely the original factory part since it displays the company logo. The company that made the part for Nissan is Vitro and it was manufactured in Mexico. Not all glass will have these logos displayed, but all will list their Federal Department of Transportation (DOT) number that the company is registered under. For example, Vitro is registered under DOT 287.

What about the line reading “LAMINATED AS1”? U.S. federal regulations require that glass pass certain safety tests. AS1 glass passes them all, AS2 does not pass all the impact tests, and AS3 is typically of a darker tint and is referred to as privacy glass. Since AS1 is the only glass to pass all safety tests, it is the only glass allowed for windshield use.

The E with a circle around it may be displayed if the product is also distributed in Europe. You may also see “CCC” with a circle around it if the product is distributed to China. Both of these markings carry similar meanings to US’s AS1 safety rating. The long number next to the E which reads “43R-000499” also pertains to European distribution. The first section, “43R”, indicates the part conforms to  European standard of safety regulation number 43. The set of numbers that follows, “000499”, is the approval number assigned to the part.

Next, we’ll look at M119. This is the manufacturer’s part number which allows them to identify the glass. There may be additional symbols, illustrations, or codes added by the manufacturer to indicate information such as date of manufacture, added options and more.

Replacing the Glass

When having your glass replaced , these manufacturer designations may help the glass company identify the exact glass needed for your vehicle. But because some vehicles can have up to 20 different windshields depending on equipment options, they may need the vehicle identification number, or even to do a visual inspection to identify a match.

Get an Estimate


I have a windshield in my garage and I don’t know what vehicle it’s for. How do I figure out what vehicle the windshield goes in? 

This is a question we commonly receive at Unfortunately, identifying what vehicle a loose windshield fits is not as easy or straightforward as one might guess. The issue is that the bug does not contain information that identifies the year, make and model of the vehicle the glass fits. This is likely because certain windshields can fit multiple vehicle years, makes and models. Succinctly listing all the compatible vehicles would be nearly impossible for the manufacturer. Manufacturers also don’t always know ahead of time exactly how many years a certain vehicle may be manufactured. The bug is simply meant to indicate the facts listed earlier in this blog; mainly stating the name of the manufacturer, that it complies with certain safety standards and basic information regarding the actual manufacturing of the part.  

Without any other information printed on the windshield, the only way to accurately know what vehicle a windshield is meant for would be to have a copy of the original purchase order. Unfortunately, these typically get lost over the years and won’t accompany the windshield. Other times, they become destroyed over time from moving the windshield around, rodents, and weather.  

Some clues may help you narrow down your search though. First, the car make is commonly listed within the bug’s information. For this reason, you’ll at least know what vehicle make the windshield matches with. Next, look at the manufacturing date which may coincide closely with the vehicle’s year. Hopefully this will help you limit it to a certain range of years, in which only certain models were present. Finally, some glass techs who have been replacing windshields for a long time can use the measurements to help identify which vehicle it might fit. However, just because the measurements are the same, does not mean it’s an exact match. This method is not foolproof and your local auto glass company will likely recommend that you order a new windshield to ensure an exact fit.  

Installing the proper windshield for your vehicle, old or new, is important for many reasons. A proper fit helps to ensure that the windshield is properly bonded to its frame. The windshield is an integral part of a vehicle’s safety system in the event of an accident, so it is paramount that the windshield stays in place upon impact. Additionally, a proper fit will ensure that leaks such as air leaks and water leaks do not occur. These leaks can be annoying at best, and detrimental to your vehicle at worst. Lastly, installing the correct windshield ensures that you retain all the same features that your vehicle came equipped with from the factory. For example, if your vehicle features rain-sensing windshield wipers, but you replace the windshield with the wrong part, your car may not be able to perform this feature any longer. attempts to provide accurate information but cannot be held liable for any information provided or omitted.  You should always work with a licensed, insured and reputable glass shop that can assess your specific needs and local building codes and offer professional services. Never attempt to cut, install, or otherwise work with glass yourself. All content is provided on an informational basis only.

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  • I have a 2002 Forest River Georgetown 306sn p32 workhorse i need drivers side windshield, the numbers are:
    AS 1 M 103 DOT 129

  • Hi Daniel,
    I see the following stamp on the windshield and I need to know if the last digits(20) refer to the manufactering date/ year, can you help me out?
    I already learned that is is manufactured by Shenzen(DOT563).

    DOT 563 A51 M848
    ** 20
    kind regards,

    • Hi Coen,
      Thanks for the question. The month and year typically are listed at the bottom of the bug, so it’s likely that this information does refer to the manufacturing date. The sum of the number of dots equal numbers. For example: ** = 2, ***** = 5. We believe this windshield was manufactured May of 2020. However, you’ll want to reach out to the manufacturer directly to find out exactly how they code their dates.

  • Audi front windshield
    Saint gobain sekurit
    DOT618 M451 102 AS1
    43R – 00348
    E 000233
    1 *
    wat does this E 000233 & 1* means
    how to check date of manufacturing and place of manufacturing

    • There should be an “E” with a one to two digit number next to it and a circle around it, which indicates the country of manufacturing. The list of country codes is below. The date code is the “1*” which we believe indicates that it was manufactured in 2001.

      E1 Germany E2 France
      E3 Italy E4 Netherlands
      E5 Sweden E6 Belgium
      E7 Hungary E8 Czech Republic
      E9 Spain E10 Serbia [and Montenegro]
      E11 United Kingdom E12 Austria
      E13 Luxembourg E14 Switzerland
      E16 Norway E17 Finland
      E18 Denmark E19 Romania
      E20 Poland E21 Portugal
      E22 Russia E23 Greece
      E24 Ireland E25 Croatia
      E26 Slovenia E27 Slovakia
      E28 Belarus E29 Estonia
      E31 Bosnia and Herzegovina E32 Latvia
      E34 Bulgaria E36 Lithuania
      E37 Turkey E39 Azerbaijan
      E40 Republic of Macedonia E42 European Community
      E43 Japan E45 Australia
      E46 Ukraine E47 South Africa
      E48 New Zealand E49 Cyprus
      E50 Malta E51 Republic of Korea
      E52 Malaysia E53 Thailand

  • I have a 1969 Corvette. The following are on the windshield:

    A “down arrow” SI in upper passenger corner
    E-Z-EYE Pretty obvious tinted
    Safety LOF (in a diagonal) Float
    ASI TL
    Laminated again, pretty obvious
    DOT 15 M24 (Dept. of Transportation) ? ?

    Does any of this info indicate the date manufactured?

    • Hi Russ,
      Thanks for the question. None of the information you provided indicates a manufacturing date as far as I can tell. Are there any other numbers or dots?

  • I have a broken rear glass that someone left in my yard when they were fleeing and hit a tree.. the only lettering I can find is
    27 4
    DOT 18 M514
    Anyone know what kind of vehicle this would belong to. Any information helps!

  • I’m leasing a Mercedes Benz. I replaced the windshield at safelite because Geico directed me there. Will that be a problem when I return the car?

    • Mercedes typically recommends replacing only using OEM parts. You’ll need to check with Mercedes directly to find out. It’s always important to keep in mind that you’re free to use the shop of your choice when having a repair done through insurance. Insurance providers are not allowed to force you to use a certain shop.

  • I’m looking for a windscreen for a bmw 535i gt 2011 , couldn’t find the exact part is there any other model that fits it?

  • I just had my windshield replaced on my pick up truck.
    The window that was in the truck was-PIlkington
    EZ Kool Plus
    Laminated ASI
    Dot 777
    The new windshield is-
    ASI M 854
    DOT 1034
    Solar Tint 2040
    Are these windshields the same level of tint?

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