> For the complete documentation index, see [llms.txt](https://docs.auterion.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.auterion.com/hardware-integration/additional-resources/remote-id/vehicle-serial-number.md).
# Vehicle Serial Number
As of AuterionOS 2.5.5, the vehicle's default serial number in Remote ID uses Auterion's registered manufacturing code, followed by a single character indicating the length of the device serial number, followed by the device serial number itself.
The device serial number corresponds to the **Vehicle serial number** string set in the Auterion Suite:
The **Vehicle serial number** string can be configured by the manufacturer up vehicle's activation.
| Bit Position | Example Content | Meaning |
| ------------ | --------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 0-3 | 1726 |
|
| 4 | 9 | The length of the Vehicle serial number, in Hexadecimal format. |
| 5-13 | 123456789 |
Vehicle serial number Max Length 16 digits.
|
The resulting vehicle serial number from the example above looks like: `17269123456789`
In AuterionOS 2.7 OEMs are able to override the manufacturer code with a custom value, in addition to configuring an extra custom ID. See the following page for more details:
{% content-ref url="/pages/6wGBBH4GJ01UVAI10s9F" %}
[Remote ID configuration](/hardware-integration/additional-resources/remote-id/remote-id-configuration.md)
{% endcontent-ref %}
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