Car Windshield Markings

Below you will find a list of Car Windshield Markings we put together from various sources, including the names, sample images, and the info. If you have samples you would like to share, please send them to us.

Name of Mark Sample Required? Details
Name of Car Manufacturer Sample of car manufacturer No For new cars, the top line normally has the manufacturer of the car. Presumably, this is only present on OEM windshields. This is apparently all letters (not the funky car manufacturer logo), but can be in the normal font for the car manufacturer.
Name/Logo of Glass Manufacturer Sample logo Sample logo US [Z26.1996] This mark identifies the manufacturer, by their name and/or logo (“the manufacturer’s distinctive designation or trademark”). Common glass manufacturers include ASAHI and Nippon Safety.
Brand Name of Glass Sample brand name of glass No Often, the trademark name of the glass is present. This includes Temperlite, Lamisafe, Lamipane, and more.
AS Number Sample AS number US [Z26.1996] The AS number stands for American Standard, and is “AS” (or “American Standard”) followed by a number indicating the position in which the glass may be used, based on its optical quality. AS1 is the clearest glass (at least 70% light transmission), is laminated, and can be used anywhere in a motor vehicle (typically just the windshield), AS2 is tempered with at least 70% light transmissions, and can be used anywhere except the windshield, and AS3 can be used in certain locations in certain vehicles (and can be laminated or tempered, and has less than 70% light transmission). There are higher numbers used for other purposes, but are not normally encountered in cars. This number must be near the manufacturer’s name/logo, preferably below it (per Z26.1996).
M Number Sample M number US [Z26.1996] The M number is a model number for the piece of glass, which identifies the type of construction. The M number is unique to the manufacturer, so one an M number of M312 by one manufacturer could be different than glass labeled as M312 by another manufacturer. It identifies the glass construction, including the color and thickness. An M number may be used by multiple part numbers.
DOT Code Sample DOT codeDOT904 US FMVSS205 6.2] The DOT code (DOT number) is the letters “DOT” followed by a number that the Department of Transportation (National Highway Traffic Safety Administration) assigns to the manufacturer of the glass. This is required by FMVSS205 section S6.2. If you have a DOT code, we have a page that lists all known DOT codes.
E Code Sample E code Yes, in EU The E code (with a capital ‘E’) is used for cars in European countries, and indicates the country that certified the windshield. It is a circle with the capital letter E followed by a number. The codes are assigned by the United Nations Economic Commission for Europe.

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 Former Yugoslav 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
e Code   No According to this site, you may see a square containing a lowercase ‘e’ followed by a number indicating a country (which matches the countries listed in the ‘E Code’ section above).
Type of Glass (Roman Numeral) Sample type of glass No According to this site, if the windshield has the E code on it, you may see a number above the E code, in roman numerals, that is likely slanted. The codes mean:

/	Extra Durable Windshield
//	Regular Multiple Layer Windshield
///	Multiple layer windshield that underwent special treatment
IV	Plastic Glass
V	Non-windshield glass, tinting less than 70%
VI	Double glass with tinting less than 70%
None	Non-windshields with tinting less than 70%
Month and Year of Production     According to this site, you may see the month and year of production, possibly at the bottom of the windshield marking.
Other Codes Sample of other codes  
U -
UV -