If you’re buying a used vehicle or want to verify that details match, the first step is knowing where to find the VIN and how to compare it precisely with the documents. Below is a concise, helpful guide with proven locations and clear steps.

What a VIN is and how it should look

VIN (Vehicle Identification Number) is a vehicle’s unique identifier. It typically has 17 characters and uses letters and numbers (I, O and Q are usually not used to avoid confusion with 1 and 0). In paperwork it may also be listed as “chassis number” or “vehicle identification number.”

  • It should be legible, with no signs of grinding, repainting or irregular indentations.
  • On the vehicle it may appear as a stamped/embossed number on the body and/or on a factory plate/sticker.

Where to find the VIN on a car

The most common locations (not all will be present on every model):

  • Lower left corner of the windshield (driver’s side), visible from outside.
  • Driver’s door pillar or frame (A/B pillar, sill) – sticker or metal plate.
  • In the engine bay: on the firewall, strut tower, or on the upper parts of the longitudinal members.
  • Trunk floor, near the spare wheel well.
  • Additional technical data plates in the engine bay or on the front bulkhead.

Practical tips for reading a VIN:

  • Clean the surface with a soft cloth – dust and protective coatings often hide characters.
  • Use a flashlight and, if needed, a small mirror for tight spots.
  • For the windshield, take a photo from outside at an angle; polarized sunglasses or a sunshade can help reduce glare.

VIN on motorcycles, scooters and light commercial vehicles

  • Motorcycles/Scooters: most often on the headstock (steering head), usually on the right side; it may also be on the frame under the seat or on a factory plate. Note: the “engine number” is not the same as the VIN.
  • Vans and light commercial vehicles: driver/passenger sill (sticker), in the engine bay (plate or stamped number), in the cabin under a seat, or on the side of the chassis.

How to compare the VIN with documents (step by step)

  1. Prepare the paperwork: registration certificate, service book, and any bill of sale/invoice.
  2. Check the format: 17 characters, a mix of letters and numbers; watch for letters that can be confused with digits.
  3. Compare character by character: the sequence must be identical in all places and in the documents (no spaces or extra symbols).
  4. Check multiple locations on the vehicle: all VINs you find must match each other.
  5. Watch for signs of tampering: fresh rivets, plates that don’t match surrounding paint, uneven stamping fonts, or signs of grinding or repainting around the number.
  6. Document everything: photograph the VIN on the vehicle and in the documents, preferably in high resolution.
  7. If the VIN is hard to read: look for an alternative location on the vehicle, gently clean the area, or try with stronger light and a magnifier.
  8. If you still can’t confirm a match: ask the seller for help or seek a professional inspection at a trusted workshop/body shop.

Quick checklist

  • I know where to find the VIN on my type of vehicle (car, motorcycle, van).
  • I’ve checked at least two locations on the vehicle.
  • In the documents and on the vehicle, every character matches 1:1.
  • No signs of modifications, grinding, or suspicious plates/rivets.
  • I have clear photos of the VIN and the documents.

Where to get more help

For more practical guidance and related topics, Browse all guides.