How to identify the chassis number and engine number on cars and motorcycles.

This article provides guidance on how to identify the vehicle identification number (VIN) and engine number on cars and motorcycles, including easily accessible locations, how to look up related documents, and how to distinguish the symbols to assist with registration, transfer of ownership, or verification of vehicle origin.

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Are you looking up the VIN (Vehicle Identification Number) or engine number of your car or motorcycle but don't know where to start? Accurately identifying the VIN and engine number is crucial for vehicle registration, ownership transfer, or verifying vehicle origin. In this article, Tiptory will guide you on how to determine your VIN and engine number in an easy-to-understand, quick, and accurate way – even if you're not technically savvy!

Part 1: How to find your car's VIN: 7 easy-to-find locations and how to identify it.

Step 1: How to quickly and easily check your vehicle's VIN number

If you cannot access the vehicle or do not wish to find the VIN number directly on the vehicle, you can check the following documents, as they usually contain the VIN number:

  • Vehicle Registration Certificate (Title)

  • Vehicle registration certificate (Registration card)

  • Owner's manual

  • Vehicle insurance documents

  • Body shop repair records

  • Police reports

  • Vehicle history reports

Step 2: The quickest way to find the VIN number on your vehicle.

  • You just need to look at the instrument panel at the front of the car, in the lower left corner of the dashboard.
  • The VIN number is usually located here and you can easily read it through the windshield, right on the driver's side.

Step 3: Check the driver's side door to find the VIN number.

  • The VIN number may also be located on the driver's side door frame (doorjamb) or on the door pillar.
  • You just need to open the driver's side door and look for a small white sticker around the edge of the door.
  • Typically, the VIN number will be located just below the rearview mirror inside the door or on the opposite side, near the driver's seatbelt buckle.

Step 4: Open the hood to find the VIN number on the engine.

  • If you can't find the VIN number elsewhere, you can open the hood and look at the front of the engine.
  • The VIN number is usually engraved or printed on the engine block, right at the front.

Step 5: Inspect the vehicle frame to find the VIN number.

  • Sometimes the VIN number is printed on the vehicle frame, on the front near the windshield washer fluid reservoir.
  • Open the hood, locate the windshield washer fluid reservoir, then close the hood and observe the vehicle's frame around that area to find the VIN number.

Step 6: Check under the spare tire to find the VIN number.

  • If you can't find the VIN number in other locations, open the trunk, lift out the spare tire, and check the tire compartment.
  • The VIN number may be printed here, right under the spare tire.

Step 7: Check under the rear wheel arch to find the VIN number.

  • Another location you could try is under the rear wheel arch of the car.
  • Go to the back of the car, bend down, and look up at the wheel arches to check both sides.
  • You may need a flashlight to see the VIN number clearly if it's printed here.

Step 8: Record the VIN number for easy reference later.

After finding the VIN number, write it down carefully and keep it in an easily accessible place:

  • Write it down in a notebook or personal document.

  • Save to your computer or phone

  • Send an email to yourself for easy access when needed.

Step 9: Determine the chassis number

  • The chassis number is the last 6 digits of the VIN number.
  • Please double-check the VIN number you have recorded, and circle the last six digits to identify your vehicle's chassis number.
  • This VIN number is also very important when you need to look up information about the vehicle.

Part 2: 3 most accurate ways to determine the VIN number on motorcycles, scooters, and ATVs.

Step 1: The simplest way to find the VIN number on a motorcycle.

  • The VIN number is usually engraved on the handlebar neck of a motorcycle.

  • The handlebar stem is the metal tube that connects the handlebars to the frame of the bicycle.

  • To see the VIN number, turn the handlebars to one side and carefully observe the steering column.

  • The VIN number is usually engraved into the metal here.

  • If you can't see it on one side, you should check both sides of the handlebars.

Step 2: How to find the VIN number on a motorcycle engine.

  • If you can't find the VIN number on the handlebars, check the engine.

  • The VIN number is usually engraved near the bottom of the engine cylinders.

  • Carefully observe the area to find the VIN number.

Step 3: How to find the VIN number on a motorcycle or ATV frame.

  • With ATVs and some motorcycles, the VIN number may be located on the frame, but it is often difficult to find.

  • First, check the exterior of the vehicle frame, especially just below the left gear lever.

  • If you can't see it, use a flashlight to carefully examine the inside of the vehicle frame.

  • Some car manufacturers have a fixed location for engraving the VIN number, for example:

    • Honda typically engraves the VIN number on the right side of the handlebars and above the frame, to the left of the engine.

  • You should refer to the manufacturer's manual to find the exact location of the VIN number.

Step 4: Important note: Mark the last 6 digits of the VIN number.

  • The last 6 digits of the VIN are the chassis number of your motorcycle.

  • Please circle or clearly mark these last 6 numbers for easy identification of the chassis number.

Part 3: How to find the engine number on cars and motorcycles: Location, symbols, and important notes.

Step 1: How to find the engine number on your vehicle.

  • The engine number is usually engraved directly onto the vehicle's engine.

  • Open the hood (if it's a car) or look carefully at the side of the engine on a motorcycle.

  • You may also see a sticker clearly stating the machine number in this area.

Step 2: Find the serial number in the user manual.

  • If you don't see a sticker or serial number engraved on the engine, check your vehicle's owner's manual.

  • Information about the machine number is usually found on the first few pages of the book.

  • The owner's manual may also include illustrations showing the location of the engine number, making it easier to find.

Step 3: How to identify the vehicle's engine number.

  • The machine number consists of 9 digits, divided into 2 parts:

    • The first three digits are the engine code.

    • The last 6 digits are the actual engine number.

  • When looking at the numbers on the engine, pay attention to distinguishing between these two parts to correctly identify the engine number.

Author: Audra Fordin .

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Audra Fordin Automotive technician

Audra Fordin is a certified automotive technician, founder of Women Auto Know, and owner of Great Bear Auto Repair in New York, with over 38 years of experience and appearances on numerous popular television shows.

Updated on Ngày 21 tháng 09 năm 2026 (GMT +7)

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Practical knowledge

Expert Q&A

In-depth analysis and practical advice from leading experts.

The VIN is a 17-character vehicle identification code. The last six characters are usually the chassis number. The engine number is a unique sequence of numbers engraved on the engine, usually nine digits, used to identify the engine specifically.

On a car, the VIN is usually found on the dashboard, the driver's side door frame, or under the hood. The engine number is located on the engine or in the owner's manual.

On motorcycles, the VIN (including the frame number) is usually engraved on the handlebars or frame; the engine number is on the side of the engine.

Yes. The inspection helps verify the vehicle's origin, avoid buying a stolen car, and ensure that the information on the paperwork matches reality.

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Disclaimer

The content on Tiptory is for informational purposes only, based on expertise and practical experience. We are not responsible for any risks arising from the application of this information. Readers are responsible for their own judgment and decisions.
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