# VIN (vehicle identification number)

> The VIN (vehicle identification number) uniquely identifies a vehicle; on modern vehicles it is a standardised 17-character code.

- **Also known as:** VIN, Şase numarası, Şasi no, Chassis number
- **Turkish term:** Şasi numarası (VIN)
- **Page:** https://motorsikletparcasi.com/en/glossary/vin

A VIN follows the ISO 3779 standard: the first three characters identify the manufacturer (WMI), the next section describes the model, the **10th character gives the model year** and the last characters are the serial number. The letters I, O and Q are not used, to avoid confusion.

On a motorcycle the VIN is usually stamped on the steering head and shown on the registration document. It is the most reliable way to match parts that changed during a model's production run, which is why we ask for it in a [part request](https://motorsikletparcasi.com/en/part-request).

## Related terms

- [OEM part](https://motorsikletparcasi.com/en/glossary/oem-part): An OEM part is made by the motorcycle manufacturer or on its behalf and matches the part fitted at the factory.
- [Aftermarket part](https://motorsikletparcasi.com/en/glossary/aftermarket-part): An aftermarket part is made by another manufacturer to replace the original part with the same dimensions and function.

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- Source page: https://motorsikletparcasi.com/en/glossary/vin
- Last updated: 2026-10-09
- Türkçe sürüm: https://motorsikletparcasi.com/sozluk/sasi-numarasi.md
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