Are you buying a used car and want to make sure that the seller is not hiding the actual equipment? Or are you planning tuning, but don’t know what engine is installed in your car? VIN code is a unique “passport” of a car that stores all the information about its modification, from the year of manufacture to the type of transmission. But how to read it correctly and where to check the accuracy of the data?

In this article we will look at step-by-step algorithm determining the modification by VIN: from the physical location of the number to the decoding of each character. You will find out what free services provide the most accurate information in 2026, how to distinguish a restyled version from a pre-restyled one, and why the VIN data may not coincide with the title. And also typical mistakes during inspection that even experienced car owners make.

What is a VIN code and where to look for it on a car

VIN (Vehicle Identification Number) is a 17-digit alphanumeric code that is assigned to a vehicle at the factory and remains unchanged throughout its “life.” It consists of three parts:

  • 🔠 WMI (World Manufacturer Identifier) — the first 3 characters indicating the manufacturer (for example, XTA — Toyota, WDB — Mercedes-Benz).
  • 📝 VDS (Vehicle Descriptor Section) — symbols 4 to 9, describing the characteristics of the model (body, engine, drive type).
  • 🔢 VIS (Vehicle Identifier Section) — the last 8 characters, where the year of manufacture, serial number and check digit are encrypted.

Where to look for VIN on a car:

  • 🚗 Under the windshield on the driver's side (the most common place).
  • 🔧 On a sign in the doorway (usually on the driver's side pillar).
  • 🔩 Under the hood (on the spar or partition of the engine compartment).
  • 📄 In the documents: PTS (line “VIN”), STS, OSAGO insurance policy.
⚠️ Attention: If the VIN on the body and in the documents do not match, this is a sign number interruptions or fake PTS. You cannot buy such a car without a thorough legal check!
📊 Where do you usually check the VIN code before buying a car?
On the back of the car
In PTS/STS
Through online services
I don't check
Another option

How to decipher the VIN code yourself: step-by-step instructions

Manual VIN decoding requires knowledge of standards ISO 3779 and the specifics of a particular manufacturer. We will analyze the universal algorithm using popular brands as an example.

Step 1. Determine the manufacturer (WMI)

The first three characters are unique to each brand. For example:

  • 🔹 JT — Toyota (Japan).
  • 🔹 WVW — Volkswagen (Germany).
  • 🔹 1G — General Motors (USA).
  • 🔹 ZFA — Fiat (Italy).

Step 2. Analyze the model description (VDS)

Characters 4–8 encode:

  • 🚪 Body type (sedan, hatchback, station wagon).
  • 🔋 Engine type (gasoline, diesel, hybrid).
  • 🔄 Transmission type (manual transmission, automatic transmission, robot).
  • 🛣️ Drive (front, rear, all-wheel drive).

Step 3. Find out the year of manufacture and serial number (VIS)

The 9th character is a check digit (checked using the algorithm LUHN). The 10th character indicates the year:

Symbol Year of manufacture Symbol Year of manufacture
A 1980 or 2010 L 1990 or 2020
B 1981 or 2011 M 1991 or 2021
C 1982 or 2012 N 1992 or 2022
D 1983 or 2013 P 1993 or 2023
R 2026 S 2026

The last 6 characters (12–17) are the unique serial number of the vehicle.

Take a photo of the VIN from the body and documents

Check the numbers match

Use the manufacturer's official decoder

Check data with PTS-->

Top 5 services for checking modifications by VIN in 2026

Deciphering VIN on your own requires time and knowledge. It is much easier to use online services that provide ready-made information about the modification. We tested popular platforms and selected the most accurate ones.

1. Official services of manufacturers

2. Universal decoders

  • 🌍 VINDecoderZ — supports 98% of global brands, free of charge.
  • 🔍 VINFreeCheck — gives the history of mileage and accidents (for a fee).

3. Paid services with car history

  • 💰 CarVertical — mileage check, repairs, deposit (from 5 €).
  • 📊 AutoCheck — data from the traffic police, customs, insurance companies (from 300₽).
⚠️ Attention: Free services are often shown truncated data. For example, instead of precisely modifying the engine (2GR-FKS) only volume can be specified (3.5L). This is critical for tuning or repair!
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If the service does not find your VIN, try entering it without spaces or dashes. Some decoders are sensitive to the input format.

How to determine engine modification by VIN code

Engine modification is one of the key parameters that affects power, fuel consumption and spare parts compatibility. In the VIN code, this information is usually encrypted in 5–8 characters (VDS section). However, different manufacturers have their own standards:

Examples of decoding for popular brands:

  • 🚗 Volkswagen/Audi: The 6th character indicates the motor type. For example, C — 1.8T, D — 2.0 TDI.
  • 🚗 Toyota: The 4th and 5th characters encode the engine series. For example, 2TR — diesel 2.7L, 3S - gasoline 2.0L.
  • 🚗 BMW: Characters 5–7 indicate the engine model. For example, N57 — diesel 3.0L.

If the VIN does not contain the exact engine code, you can find it:

  • 📄 On the plate under the hood (next to the VIN).
  • 🔧 In the electronic control unit (via a diagnostic scanner).
  • 🔍 In the manufacturer's database (upon request from an official dealer).

For accurate identification, use engine code (for example, M274 DE20 AL for Mercedes-Benz). You can check it:

https://www.motor-codes.com/{engine_code}
What to do if the VIN does not contain engine data?

In this case, the modification can be determined by:

1. Engine number (stamped on the cylinder block).

2. Markings on the valve cover.

3. Electronic diagnostics (via OBD-II scanner).

If the engine is replaced, the VIN data will no longer be current - a physical inspection is required.

Differences between restyling and pre-restyling: how to find out by VIN

Many cars passed restyling (design and specification update) mid-life cycle. For example, Toyota Camry XV50 produced in pre-restyle (2011–2014) and restyle (2015–2017). How to determine this by VIN?

Method 1. By year of manufacture (10th character of VIN)

Compare the production year with the facelift dates for your model. For example:

  • 📅 Volkswagen Passat B6: dorestayl - until 2008 (8 in VIN), restyling - 2009–2010 (9 or A).
  • 📅 Hyundai Solaris: first generation - 2011–2014 (B–E), restyling - 2015–2016 (F–G).

Method 2. By control characters in VDS

Some manufacturers change 4–8 VIN characters when restyling. For example, at Kia Rio III:

  • 🔠 Dorestyle (2011–2014): Z94CB41A*.
  • 🔠 Restyle (2015–2017): Z94CB41B*.

Method 3. By additional options

Restyled versions often receive new features that can be checked by VIN:

  • 🔦 LED headlights instead of halogen ones.
  • 📱 Multimedia system with support Apple CarPlay.
  • 🚨 Security systems (AEB, Blind Spot Monitoring).
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If there are no obvious signs of restyling in the VIN, check the data with the spare parts catalog. For example, the bumpers and headlights of pre-restyle and restyle have different part numbers.

Typical mistakes when checking modifications by VIN

Even experienced car owners make mistakes that lead to incorrect identification of the modification. Here are the most common:

1. Using unofficial decoders

Many sites give outdated data or information from other markets (for example, for USA DMV instead of Europe). Always check data with official sources.

2. Ignoring regional characteristics

The same VIN can indicate different modifications for different countries. For example, Ford Focus for USA and Russia may have different engines with the same body.

3. Confusion with production years

The 10th character of the VIN indicates model year, not the actual year of manufacture. For example, a car with the symbol J (2018 model year) could be released in December 2017.

4. Unverified engine data

If the engine is replaced, the VIN will show original modification, and not the one that is installed now. Always check the engine number physically!

5. Errors during manual decoding

Some VIN characters are easy to confuse (for example, B and 8, D and 0). Always double-check your input.

⚠️ Attention: If, when checking the VIN, the service displays a message "Invalid VIN" or "No data", this could mean:
  • 🔹 Error in entering the number (check the characters O/0, I/1).
  • 🔹 Car assemblies for the domestic market (for example, Chinese models for Asia).
  • 🔹 Fake VIN (often found in stolen or “broken” cars).

FAQ: Frequently asked questions about checking modifications by VIN

Is it possible to find out the color of a car using the VIN?

Yes, but not in all cases. Color is usually indicated in VDS sections (4–8 characters), but some manufacturers (e.g. BMW) code it separately. For an exact determination, check the plate on the driver's door or documents.

Why does the VIN data not match the title?

This is possible in three cases:

  1. 📄 Error in PTS (typo, fake).
  2. 🔧 Replacing the body or frame (VIN was transferred from another car).
  3. 🚗 The car is assembled from different components (for example, after an accident).

In any case, such a car must be checked through the traffic police and examination.

How to check VIN for theft or traffic police restrictions?

To do this, use the official services:

Important: The traffic police database is updated with a delay of up to 30 days!
Is it possible to find out the mileage of a car using the VIN?

No, the VIN itself does not contain mileage information. However, some paid services (for example, CarVertical or AutoCheck) collect mileage history from service stations, insurance companies and dealers. The accuracy of such information is about 80%.

What to do if the VIN is erased or damaged?

If VIN is not readable:

  1. 🔍 Check other locations (doorway, under the hood).
  2. 📄 Check with PTS or STS.
  3. 🚔 Contact the traffic police to restore data (expertise will be required).
⚠️ Attention: If VIN is erased intentionally (traces of filing, putty) - this is a sign of the criminal history of the car!