Car Glass Codes Explained: Which Code Orders the Right Windscreen

What shops mean by car glass codes

When someone on the phone asks for “the glass code”, they can mean very different things. It might be the ARGIC eurocode your wholesaler stocks, the carmaker's OE part number, the glass manufacturer's own catalogue number, or the marks printed in the corner of the screen. They all look like codes, but only some of them identify a part you can order. Mixing them up is one of the quickest ways to get the wrong windscreen on the van.

For how the eurocode itself is built, read ARGIC eurocode explained. For how the eurocode and the carmaker's number work together on one order, see OE part number vs eurocode. This page maps every code you'll meet on a windscreen job and shows which one belongs on the PO.

Why the wrong code means the wrong windscreen

Codes cause returns when a real number is used for the wrong job. Three habits cause most of it:

• Reading the stamp as a part number — the marks in the corner show who made the glass and which safety approval it carries. They don't tell the wholesaler which version of the screen to pick.
• Quoting one supplier's number to another — a glass maker's catalogue number or a wholesaler's stock code only means something inside that company's system. Another supplier may not recognise it, or may cross-reference it to a different screen.
• Copying the code from a similar car — two cars of the same model and year can need different windscreens because of camera, sensor, heating, acoustic or HUD options. The code has to come from this vehicle.

The stamp is still useful once you know what to order. For how to read it in the bay, see windscreen bug marking, and use it to confirm the glass, not to identify it.

The car glass codes you'll meet, and what each one is for

It helps to sort them by what they can actually do for you:

• Orderable codes — the ARGIC eurocode, used across UK and European aftermarket supply, and the OE/OEM part number from the carmaker. Together they identify the exact windscreen, options included. These are the codes that go on the PO.
• Catalogue and stock codes — glass maker part numbers and wholesaler stock codes. They work inside one supplier's system, but they're cross-references, not a shared language. In the US and Canada shops order on NAGS numbers instead; if one turns up on an import or a US parts site, read NAGS vs eurocode before you rely on it.
• Marks on the glass — the approval mark (an E in a circle with a country number, plus a 43R approval number under UN ECE Regulation 43), symbols for laminated glass, DOT and AS1 marks on US-spec glass, the maker's logo and a date code. They confirm what the glass is, not which version the car needs. For the options that split one model into several parts, see types of windscreen.

The date code is a good example. It usually shows when the glass was made with a digit and a pattern of dots, which can help you spot a screen that has already been replaced. But the dot pattern varies by manufacturer, and it says nothing about cameras, heating or acoustic layers. Treat every mark in the corner the same way: a check, not an order line.

Shop path: VIN → eurocode + OE → check the marks → fit

The fix is simple: let the codes come from the vehicle, not from the old glass or a car that looks the same. The VIN is the one reference that ties the car to the way it left the factory.

A clean path looks like this:

1. Capture a clean 17-character VIN — from the V5C, the base of the windscreen or the door pillar. Watch the O/0 and I/1 traps. Use the VIN 17 characters checklist if photos or OCR are messy.
2. Run a glass VIN lookup — get the orderable ARGIC eurocode and OE/OEM part number for the windscreen actually fitted to that vehicle, with its camera, sensor and heating options.
3. Order on eurocode, cross-check with OE — eurocode for aftermarket and wholesaler stock, OE for dealer channels and as a second check. If the wholesaler replies with their own stock code, ask which eurocode it maps to.
4. Check the marks when the glass arrives — match the label to the eurocode, then compare the corner marks, camera bracket, sensor area and edge finish with the old screen before you cut it out.

Registration plate / VRM: customers usually give you the reg first. Plate-based identification is coming soon on AutoglassPortal. Until then, note the reg on the job card and use the VIN to identify the glass.

Scope: this guide covers windscreens only, not side, rear or roof glass, and is written for UK glass repair shops and windscreen companies ordering from wholesalers.

For the full VIN → part number workflow, see windscreen part number lookup by VIN.

Which code the wholesaler and the carmaker use

UK wholesalers stock and pick on eurocode, and most can cross-reference OE numbers and their own stock codes back to it. If you buy from more than one supplier, the eurocode is the code they all share. See windscreen suppliers UK for how to order with eurocode and OE together.

The carmaker's OE number matters most on ADAS screens, where the camera bracket and the glass in front of the camera have to match the car exactly for calibration to pass. Read ADAS windscreen identification for the camera-side checks.

Common car glass code mistakes

• Writing the 43R approval number from the stamp on the order as if it were a part number.
• Sending one wholesaler's stock code to another supplier without the eurocode.
• Using the date code to decide a screen is original, then ordering the same glass without checking the VIN.
• Dropping the option part of the eurocode, so a HUD, heated or acoustic screen turns into a plain one. See HUD windscreen eurocode.
• Trusting a NAGS number from a US parts site for a UK or European car.
• Not saving the eurocode and OE number on the job, so nobody can trace which windscreen was fitted if the customer comes back.

A repeatable workflow for the desk and the bay

Put the codes in the right order, and the right one on the PO:

1. Job booked → capture the VIN (note the reg on the card; the VIN still drives the glass ID).
2. Office or van tablet → VIN lookup → eurocode + OE on the PO.
3. Wholesaler confirms stock against those IDs → any stock code is mapped back to the eurocode.
4. Bay check → label and corner marks compared with the order and the old screen → fit → ADAS calibration when required → codes saved on the job.

AutoglassPortal is built for that VIN → eurocode + OE step. See what AutoglassPortal is and the VIN to eurocode API if you want the same lookup inside your own job management or quoting software.

Brand pages when the VIN is already known

Once you have the VIN, brand hubs help with model context. Start from the windscreen brand index, including BMW, Volkswagen, Audi, Mercedes. Still order on eurocode and OE, not on the badge alone.

FAQ