Have you ever looked closely at the little symbols in the corner of your windshield? These intricate combinations of letters, numbers and pictograms are not just a manufacturing defect or decoration. Automotive glass markings contains critical information about its origin, safety and compatibility with your vehicle.

From the date of manufacture to the level of protection in case of an accident, every sign matters. For example, the lack of correct E-code may cause a refusal to pass a technical inspection, and incorrect glass thickness may cause the insurance company to refuse payment after an accident. In this article we will look at all current labeling standards for 2026, including rare designations for tinted and laminated glass.

Where to look for markings on car glass

Manufacturers apply markings in strictly defined places so as not to obstruct the driver’s visibility. The markings on the windshield are usually located:

  • 🔹 In the lower corner on the driver's side (the most common place)
  • 🔹 In the center of the bottom edge (for heated windows)
  • 🔹 In the upper corner on the passenger side (rarely, mainly on older models)

On the side and rear windows the markings may be:

  • 🔹 In the upper corner closer to the door (for side windows)
  • 🔹 In the center of the lower edge (for heated rear windows)
  • 🔹 On the tinted stripe (if there is one)

It is important to check the labeling when buying a used car — a discrepancy between the production date of the glass and the car may indicate a replacement after an accident. Please also note the availability manufacturer holograms (for original glasses Pilkington, Saint-Gobain or Fuyao it is required).

📊 Where do you usually check the glass markings?
In the lower corner of the windshield
On the side glass
Never watched
I don't know where to look

Labeling structure: what the main blocks mean

Standard markings consist of 3-5 groups of characters separated by spaces or dashes. Let's look at an example of a real designation:

E1 43R-012345 M123 32% AS2

This combination is deciphered as follows:

  1. E1 — certification country code (Germany)
  2. 43R-012345 - type approval number (43R) and serial number (012345)
  3. M123 - manufacturer code (here Magna)
  4. 32% — light transmission (for tinted windows)
  5. AS2 – type of glass (tempered, laminated)

The first two blocks (E1 43R-012345) - this is the so-called E-code, which confirms compliance with European safety standards. Without it, glass will not pass certification for use in the EU and Russia. The last three blocks contain technical specifications and manufacturer information.

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If the marking does not contain an E-code, such glass cannot be used on public roads - this is a violation of traffic regulations (clause 7.3 of the “Basic provisions for vehicle approval”).

E-code decoding: country and certificate number

The first part of the marking always begins with a letter E (from the word Europe) and the numbers are the code of the country that issued the certificate. Here are the current designations for 2026:

Code Country Note
E1 Germany The most common code on glass for the European market
E2 France Often found on glass Saint-Gobain Sekurit
E4 Netherlands Used for premium glass brands
E11 UK Found on windows for right-hand drive cars
E22 Russia Mandatory for glass manufactured after 2015

After the country code there is a certificate number (for example, 43R-012345). The first two digits (43) denote UNECE rule, according to which the glass is certified:

  • 📜 43 — safety glass (windshield and front side)
  • 📜 43S - glass with sun strip
  • 📜 17 - seats and their fastenings (rarely occurs, by mistake)

The letter after the rule number (R in our example) indicates approval series. The numbers after the dash are the manufacturer's unique certificate number.

What to do if the E-code is erased?

If the marking is unreadable, you can request a duplicate certificate from the glass manufacturer (vehicle VIN is required) or contact an accredited laboratory for recertification. The cost of the procedure is from 3,000 rubles.

Manufacturer codes: who made your glass

The third group of symbols in the marking (for example, M123) is manufacturer identifier. The largest manufacturers have standard designations:

Code Manufacturer Features
SG or SGG Saint-Gobain Sekurit (France) Market leader, supplies glass for Renault, Peugeot, Volvo
P or PILK Pilkington (UK) Specializes in heated glass and rain sensors
F or FY Fuyao Glass (China) The largest Chinese manufacturer, supplies for Toyota, Honda, Hyundai
M or MTH Magna (Canada/Germany) Produces glass for premium brands (BMW, Mercedes)
AGC Asahi Glass Co (Japan) Specialization - highly soundproof glass

If the marking contains a set of numbers instead of a letter code (for example, 12345), this indicates small manufacturer or OEM supplier. Such glass is often installed on budget car models (Lada, Datsun, Ravon).

Please note: some manufacturers apply additional marking with logo (for example, Pilkington often adds its own leaf icon). This is not a mandatory element, but its presence confirms the originality of the glass.

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Glass without manufacturer identification (digital code only) may be an uncertified copy. Before purchasing, check it for compliance with GOST R 51709-2001.

Technical parameters: thickness, type and light transmittance

The last part of the marking contains critical technical data, which affect the safety and legality of glass use. Let's look at the basic notation:

1. Glass type

  • 🔘 AS1 — tempered glass (side and rear windows)
  • 🔘 AS2 — multilayer (triplex) for windshields
  • 🔘 AS3 — special hardened (for buses)
  • 🔘 T - tinted glass (must be accompanied by an indication of light transmission)

2. Thickness

Indicated in millimeters, for example:

  • 📏 4.0 - standard thickness for windshields
  • 📏 3.2 — lightweight glass (for sports cars)
  • 📏 5.0+ — reinforced glass (for SUVs)

3. Light transmission

For tinted glass, the percentage of light transmission is indicated:

  • ☀️ 75% — standard for windshields (according to GOST)
  • ☀️ 30% — maximum permissible tinting for side windows
  • ☀️ 15% — “mirror” tinting (prohibited in Russia)

Special attention should be paid to the designation UV - it indicates the presence UV filter, which protects the interior from burnout. Such glass is often installed on premium cars (Audi, Lexus, Volvo).

Make sure you have the E-code (E1, E2, E22, etc.)

Check the manufacturer's code with the original one (using the VIN of the car)

Check the type of glass (AS2 for windshield)

Measure the light transmittance of the tint (if any)

Inspect for chips and cracks (even microscopic)

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Production date: how to determine the age of glass

In car glass markings The year of manufacture is not always indicated - it depends on the manufacturer. However, there are several ways to determine age:

  1. Direct designation - some brands (Pilkington, Saint-Gobain) put the date in the format WWYY (week/year). For example, 2523 means 25th week of 2023.
  2. Batch code - from manufacturers from Asia (for example, Fuyao) the date may be encrypted in the serial number. It can be decrypted through the manufacturer's database.
  3. Hologram — original glasses often have a holographic sticker with the production date.

If the date is not indicated explicitly, it can be determined by indirect signs:

  • 🔍 Compare with the car’s production date (the glass cannot be older than the car)
  • 🔍 Check for modern technologies (for example, heating or rain sensors appeared after 2010)
  • 🔍 Pay attention to the design of the markings (old glasses have a simpler font)

Why is this important? Glass, like any material, gets old with time. After 10-15 years of use, it becomes more fragile, especially if the car was often parked in the open sun. In the event of an accident, such glass can break in unexpected ways, increasing the risk of injury.

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If you buy a used car, and the glass date is significantly newer than the car's production date, this is a sign of a serious accident in history. Check the history by VIN!

What to do if the markings are missing or unreadable

Lack of marking is serious violationwhich can lead to problems:

  • ⚠️ Refusal to undergo technical inspection (clause 3.1 of Appendix 8 to the Technical Regulations of the Vehicle)
  • ⚠️ Fine 500 rubles under Art. 12.5 Code of Administrative Offenses (driving a vehicle with inappropriate windows)
  • ⚠️ Refusal of insurance to pay in case of an accident (if the glass is not certified)

If the markings are worn off or not visible, you have several options:

  1. Contact an authorized dealer — using the car’s VIN, they can provide information about the original glass.
  2. Check through the UNECE database - on the website UNECE certificates can be found by approval number (e.g. 43R-012345).
  3. Order an examination — accredited laboratories (for example, US or FSUE "Standardinform") can confirm that the glass meets the standards.

The cost of the examination varies from 2,000 to 5,000 rubles depending on the region. If you are planning to replace glass, it is better to immediately choose a certified option - this will save you from problems in the future.

⚠️ Attention: Some “craftsmen” suggest applying the markings yourself using an engraver. This illegal — falsification of official designations is equivalent to falsification of documents (Article 327 of the Criminal Code of the Russian Federation).

FAQ: Frequently asked questions about car glass markings

Is it possible to drive with glass without an E-code?

No, this is a traffic violation. According to clause 7.3 of the "Basic provisions for vehicle approval", all glass must have a certificate of conformity. If you are stopped by a traffic police inspector, you face a fine of 500 rubles (Article 12.5 of the Administrative Code). In addition, such glass will not pass technical inspection.

How to check the authenticity of glass Pilkington?

Original glass Pilkington have:

  1. Green leaf logo in the corner
  2. Hologram with serial number
  3. Marking with letter P or PILK
  4. Unique batch number (can be checked on the manufacturer’s website)

If at least one of these elements is missing, you have a fake.

What does the designation mean? DOT-123 on American glass?

This is the US equivalent of an E-code issued by the Department of Transportation (Department of Transportation). Numbers after DOT is the manufacturer's identifier. Such glass is legal for use in Russia, but may raise questions during technical inspection (it is recommended to have a GOST certificate of conformity).

Is it possible to determine from the markings whether the glass was involved in an accident?

Directly - no, but there are indirect signs:

  • The glass production date is significantly newer than the car production date
  • The marking is in a non-standard font (fake is possible)
  • The original manufacturer's hologram is missing
  • Presence of microcracks not visible to the naked eye (checked under a UV lamp)

An accurate check requires an examination by a specialist.

Which glass is better? Saint-Gobain or Pilkington?

Both brands comply with European standards, but there are nuances:

  • Saint-Gobain Sekurit - better sound insulation, often installed on French and German cars
  • Pilkington - more scratch resistant, popular with Japanese manufacturers

The choice depends on the car model. For example, for Renault or Peugeot preferable Saint-Gobain, and for Toyota — Pilkington.