VIN Number - What It Is, Where to Find It and How to Check a Car History

Every seller will tell you the same thing: no accidents, one careful owner, full service history. I've heard it hundreds of times. The real question is how you verify any of it before you've driven two hours to look at the car. The answer is 17 characters - the VIN.

What is a VIN number

VIN stands for Vehicle Identification Number. It's been mandatory on every car sold in Europe and the USA since 1981 - exactly 17 characters, unique worldwide for at least 30 years.

Each section tells you something specific:

• Characters 1–3 - manufacturer code (e.g. WBA = BMW, WVW = Volkswagen, WAU = Audi)
• Characters 4–8 - model, engine type, trim level
• Character 9 - check digit (detects fake VINs)
• Character 10 - model year (e.g. G = 2016, H = 2017, J = 2018)
• Characters 12–17 - serial number from the production line

Think of it as the car's fingerprint. Every insurer, police registry, and database worldwide uses that number to log damage claims, thefts, and warranty work.

Where to find the VIN in a car

Every car has the VIN in at least two places. I always check both - if the numbers don't match, that car has a story it's not telling you.

1. Lower edge of the windshield - visible from outside on the driver's side. The hardest to forge.
2. Driver's door pillar - sticker or stamping on the frame
3. Engine bay nameplate - on the firewall or sill
4. Registration document - field "E" or "VIN"
5. Vehicle card - required for imported vehicles

Before handing over any money, compare the windshield VIN with the one on the registration document. A car is only as honest as its paperwork - and a scratched, sanded-down, or missing windshield VIN is reason to walk away immediately.

What you can check for free in CEPiK

CEPiK (Poland's Central Vehicle and Driver Register) is a free public database at historiapojazdu.gov.pl - no login, no fee.

What you'll see:

• Registration dates and countries (whether the car was imported and from where)
• Odometer readings from successive roadworthiness tests - this is where you spot rolled-back mileage
• Continuous third-party insurance coverage (gaps are a warning signal)
• Damage claims recorded in Poland

What CEPiK won't show:

• Accidents that happened abroad (a collision in Germany won't appear in CEPiK)
• Thefts reported in other EU countries
• History from private garages and dealerships

If the car has never left Poland, CEPiK will cover most of what you need. If it came in from Germany, France, Belgium, or the USA - it won't be enough on its own.

When to pay for a full VIN report

When CEPiK runs out of answers, you need a proper paid report. CarVertical pulls data from hundreds of sources at once:

• Insurance damage databases from across Europe and the USA
• Stolen vehicle registries (Interpol, ANPR)
• History from private service networks and dealerships
• Auction and sales platforms (Copart, BCA, Autobid)
• CEPiK equivalents from 28 countries

Price: approx. €29. For a car worth €10,000–20,000, that's less than 0.3% of the purchase price. One report can save you thousands in hidden damage repairs.

How Autolert uses the VIN

When you paste a listing link into Autolert AI, the VIN is one of the first things the tool checks:

1. We check for its presence - a missing VIN in a listing is an automatic red flag. It's one of 10 risk signals Autolert verifies in 60 seconds - the full list is in the article what to watch out for in car listings.
2. We validate the structure - we check whether the check digit matches. A forged or fictional VIN is caught before you waste your time travelling to view the car.

A full history report from external databases can be ordered directly from within the analysis - one click, result in 2 minutes.