MotR
Vehicle Identification · UK Guide

What Is a VIN Number?

Every vehicle manufactured since 1981 carries a 17-character VIN — a unique identity code that cannot be legally changed. Here is what it means, where to find it, and why it matters before buying any used car.

Official UK dataFree to useInstant resultsNo account needed
What Is a VIN Number?
The short answer

A 17-character code that cannot legally be changed

A VIN (Vehicle Identification Number) is a standardised 17-character code permanently assigned to every vehicle at manufacture. It identifies the country of origin, manufacturer, model, engine type, year, and production sequence. It cannot legally be changed or removed. Find it on the dashboard plate (visible through the windscreen), door sill, bonnet, and V5C logbook. A mismatch between any of these is a serious fraud indicator.

Decode it

Decoding a VIN: What Each Section Means

A standard 17-character VIN is divided into three sections. Using the example WBA3A5C51DF123456:

PositionCharactersNameWhat it encodes
1–3WBAWorld Manufacturer Identifier (WMI)Country of manufacture (W = Germany) + manufacturer (BA = BMW)
4–83A5C5Vehicle Descriptor Section (VDS)Vehicle type, body style, engine type, series/trim
91Check digitMathematical validation digit — used to detect counterfeits
10DModel yearD = 2013 (follows ABCDEFGHJK... sequence skipping I, O, Q)
11FPlant codeManufacturing plant where the vehicle was built
12–17123456Sequential numberIndividual production sequence number — unique to this vehicle
Where to look

Where to Find the VIN on Your Car

Dashboard VIN plate

A small plate or sticker visible through the windscreen at the base of the driver's side A-pillar. Readable without opening the car.

Driver's door sill

Stamped or riveted directly into the metal structure of the door sill (the horizontal bar at the base of the door opening).

Under the bonnet

On a sticker or plate near the firewall (bulkhead) or inner wing. Location varies by manufacturer.

V5C logbook

Listed as 'VIN / Chassis No.' on the front page. This is the official DVLA-recorded number and is the primary reference for verification.

Engine block (some models)

Stamped directly into the engine block — particularly on older vehicles. Less common on post-2000 cars.

Insurance / finance documents

Your insurance certificate and any finance paperwork will record the VIN. Useful if you cannot access the physical vehicle.

Fraud signals

VIN Fraud: Signs of Tampering to Check For

Why VIN tampering happens

Criminals alter VINs to hide a vehicle's true identity — typically to conceal that it is stolen, has been in a serious accident, is a 'cut and shut' (two vehicles welded together), or has been clocked. The VIN plate is often the first place to check when something feels wrong about a car.
VIN plate has been re-riveted — original rivet holes visible or fresh rivets in old metal
Characters are inconsistently spaced, different typeface, or some digits look newer
Dashboard plate is a sticker that has been re-applied, with bubbling or peeling edges
VIN on door sill doesn't match dashboard plate or V5C
VIN plate appears painted over or there are signs of grinding/re-stamping
Door sill VIN has been covered with underseal or paint to obscure it

Check MOT History Before You Buy

Free DVSA official data — mileage, advisories, failures. 30 seconds.

Check MOT History Free →
Questions & answers

Frequently Asked Questions

What does VIN stand for?
VIN stands for Vehicle Identification Number. It is a standardised 17-character alphanumeric code assigned to every motor vehicle at the point of manufacture. The standard (ISO 3779) has been internationally applied since 1981. Pre-1981 vehicles may have shorter VINs with different formats.
Where can I find the VIN on my car?
The VIN appears in several places: (1) The V5C logbook — on the front page as 'VIN/Chassis Number'. (2) The dashboard VIN plate — visible through the windscreen at the base of the driver's side, often visible from outside. (3) The driver's door sill — stamped or riveted into the metal structure. (4) Under the bonnet — on a sticker or stamped plate near the engine bay firewall. (5) On the engine block itself on some models.
Can a VIN be changed?
No — a VIN is legally protected and may not be altered, removed, or defaced. Tampering with a VIN is a criminal offence under the Vehicle Excise and Registration Act 1994 and the Fraud Act 2006. Vehicles with tampered VINs may be seized by police. If any VIN plate on a car appears to have been re-stamped, drilled out and replaced, or shows inconsistent typeface, treat it as a serious fraud signal.
What information does a VIN encode?
A 17-character VIN encodes: World Manufacturer Identifier (first 3 chars — identifies country and manufacturer), Vehicle Descriptor Section (chars 4–9 — model, body type, engine, series), Check Digit (char 9 — mathematical validation), Model year (char 10), Plant code (char 11), Sequential production number (chars 12–17). Together they provide a globally unique vehicle identity.
Are VIN numbers the same as chassis numbers?
For modern vehicles (post-1981), VIN and chassis number are used interchangeably and refer to the same 17-character code. On older vehicles, 'chassis number' may refer to a shorter code stamped on the physical chassis frame, separate from any manufacturer plate. The V5C records the VIN/chassis number in a single field.
What should I do if the VIN on a car doesn't match the V5C?
Do not proceed with the purchase. A VIN mismatch means the V5C does not correspond to the physical vehicle — either the car has been subject to a 'cut and shut' (two cars welded together and given one identity), has cloned plates, or has had its identity deliberately altered to hide accident history or stolen status. Report your concerns to the police and DVLA if you suspect fraud.
Related tools

Related Tools & Resources

How to Check a VIN

Verify a VIN and detect tampering

Open

What Is a V5C Logbook

Reading the V5C correctly

Open

Full History Check Guide

Complete step-by-step process

Open

Stolen Car Check

How to verify stolen status

Open

Used Car Checks Hub

Full pre-purchase check process

Open

MOT History Checker

Free DVSA official data

Open

Vehicle Report

Full DVLA vehicle details lookup

Open

Vehicle Records Hub

All records guides

Open

VIN standards follow ISO 3779. Vehicle identity is recorded by DVLA on the V5C. MotR is not affiliated with DVLA, DVSA, HPI or GOV.UK. Always verify a VIN against the physical vehicle and V5C before purchase. Last reviewed 13 June 2026.

Keep reading

How to Check a VIN Number

How to verify a VIN in the UK, detect tampering, and confirm a vehicle's identity.

Open