Reference

Where to find the VIN

The VIN appears in several places on most vehicles. If two of them disagree, that is worth investigating before you buy.

By Pixoware. Published 12 September 2026, updated 28 October 2026.

On a car or light truck the VIN is in at least two places on the vehicle and on most of its paperwork. Motorcycles, trailers and vehicles built in stages follow different rules, and some vehicles are outside the federal rules entirely. This guide covers where federal regulations put the number, and what to do when it is not where it should be.

Cars, SUVs, pickups and vans

Through the windshield

For passenger cars, multipurpose passenger vehicles (most SUVs and minivans), low-speed vehicles and trucks of 10,000 lb GVWR or less, 49 CFR 565.13 requires the VIN to be inside the passenger compartment and readable from outside, through the glass, by someone standing next to the left windshield pillar in daylight. Each character must be at least 4 mm tall. In practice that means a plate on the dashboard at the lower left of the windshield, which is where NHTSA tells owners to look first.

On the door jamb: the certification label

The sticker or plate you find when you open the driver's door is the federal certification label required by 49 CFR Part 567. It goes on the hinge pillar, the door-latch post, or the edge of the door that meets the latch post, next to the driver's seating position. Only if none of those is practicable may it go on the left side of the instrument panel or the inside face of the driver's door.

The label must be riveted or permanently affixed so it cannot be removed without destroying or defacing it, and it carries:

the manufacturer's name;
the month and year of manufacture, meaning when work was completed at the main assembly plant;
the gross vehicle weight rating and the gross axle weight rating for each axle;
a statement that the vehicle conforms to the applicable federal safety standards in effect on that date;
the VIN; and
the vehicle type, such as truck, MPV or bus.

It is usually easier to read than the windshield plate, and it is the only place on the vehicle that gives the build date. The VIN does not encode one; see model year codes for the difference between model year and build date.

Stamped on parts

The federal theft prevention standard, 49 CFR Part 541, requires the VIN to be marked on major parts of the vehicles it covers: the engine and transmission, the hood, front fenders, doors, bumpers, rear quarter panels or side assemblies, the decklid, tailgate or hatchback, and the pickup box of a light truck. Engines and transmissions may carry a shortened form of at least the last eight characters. The standard covers passenger cars, multipurpose vehicles of 6,000 lb GVWR or less, and light trucks NHTSA has determined to be high-theft, with exemptions for small makers, low-volume lines and lines exempted under Part 543. So the markings are common but not universal, and they are often hard to reach.

Motorcycles

On a motorcycle the certification label, VIN included, must be on a permanent part of the vehicle as close as practicable to where the steering post meets the handlebars, readable without moving anything except the steering. Look around the steering head first. The owner's manual will say whether the number is also stamped into the frame and where.

A motorcycle also has an engine number, which is a different thing. California's vehicle verification form, for example, asks for both the VIN and the engine number of every motorcycle. Do not decode the engine number; it is not a VIN.

Trailers

A trailer's certification label goes on the forward half of the left side, readable from outside the vehicle. On a manufactured trailer, start at the front of the left side of the frame or body.

A homemade trailer has no manufacturer and therefore no manufacturer's VIN. States handle this themselves. Virginia, for instance, issues an assigned VIN plate for homemade trailers on its form VSA 22, which a law enforcement officer must see mounted before the trailer is titled, and New York has a form to request a VIN for a homemade trailer of 999 lb or less. Those numbers come from the state, not from a manufacturer filing, which matters if you try to decode one.

Motorhomes and vehicles built in stages

Some vehicles are built in more than one stage: one company makes an incomplete vehicle, such as a chassis with an engine and drivetrain, and another finishes it. Part 565 says a vehicle built in stages keeps the VIN assigned by the incomplete vehicle manufacturer. The final-stage manufacturer adds its own certification label, which also lists the VIN and must not cover the labels of earlier stages.

Two practical consequences. First, the VIN on a motorhome or similar vehicle built this way is the chassis maker's, so a decode may describe the chassis rather than the finished coach. Second, you may find more than one certification label; read all of them, and check that they show the same VIN.

ATVs and other off-road vehicles

Federal motor vehicle safety law covers vehicles manufactured primarily for use on public streets, roads and highways. A machine built mainly for off-road use is outside that definition, so Parts 565 and 567 do not dictate where its number goes or what format it takes. Many ATVs and off-road motorcycles fall into this group. For those, the owner's manual or a dealer for that brand is the reliable guide, and a VIN decoder built on NHTSA data may have little or nothing on them.

On the paperwork

Registration card. NHTSA notes that the VIN is on your registration card.
Insurance card. It may be, according to NHTSA; insurers differ.
Title. When ownership changes, the federal odometer disclosure made on the title must identify the vehicle by make, model, year, body type and VIN.
Dealer and service paperwork. Often records it too, but it is a copy of a copy.

Paperwork is useful for checking, not for sourcing. If you are buying, read the number off the vehicle and compare it to the title, not the other way round. If you are checking a car remotely, ask the seller for a clear photograph of the door-jamb label and the windshield plate rather than a typed-out number.

Reading it accurately

Windshield plates sit behind angled glass and are hard to read in bright sun; shade the glass with your hand or photograph it. Remember that I, O and Q never appear, so what looks like one of them is a 1 or a 0. Then run the result through the check digit validator: a single wrong character usually makes it fail, and decodes to a different vehicle or to nothing at all.

When the numbers disagree

A mismatch between the windshield plate, the door-jamb label, the stamped parts and the title is a serious signal. It can be innocent: Part 567 allows the label to go on the door edge, so a replacement door from another car can bring that car's label with it, and used body panels taken from another vehicle carry that vehicle's markings. It can also mean a cloned or rebuilt vehicle; see VIN cloning and fraud. Either way it needs an explanation, in writing, before money changes hands.

If the dash plate is missing or tampered with

A windshield plate that is missing, loose, scratched, held on with fasteners that do not look factory, or covered by something that will not come off is the one finding that should end a purchase on the spot. Knowingly removing, obliterating, tampering with or altering a motor vehicle identification number is a federal crime under 18 U.S.C. 511, punishable by up to five years in prison. Even if the seller had nothing to do with it, you would be buying a car whose identity you cannot confirm.

If you are buying: do not buy it. Keep the listing, photographs and the seller's details, and if you suspect theft, report it to local police.
If you already own it: go to your state motor vehicle agency or law enforcement rather than fixing it yourself. States run inspection processes for this. Virginia's form VSA 22, for example, covers vehicles whose VIN is missing, changed or altered, and has a DMV special agent install the assigned VIN plate. In California, vehicle verifications are done by the DMV, licensed verifiers, auto clubs or peace officers, with some cases referred to the Highway Patrol. Do not reattach, replace or re-stamp a plate on your own.

Quick answers

Where is the VIN on a car?

On a plate on the dashboard at the lower left of the windshield, readable through the glass from outside, and on the certification label on the driver's door jamb. It is also on most of the vehicle's paperwork, including the registration card.

Where is the VIN on a motorcycle?

Near the steering head. The certification label, VIN included, must be on a permanent part as close as practicable to where the steering post meets the handlebars, and the owner's manual will say whether the number is also stamped into the frame.

Where is the VIN on a trailer?

On the forward half of the left side. A trailer's certification label must be readable from outside the vehicle, so on a manufactured trailer start at the front of the left side of the frame or body.

What should I do if the VIN plate on the dash is missing or tampered with?

If you are buying, do not buy it: you would be buying a car whose identity you cannot confirm, and knowingly altering a VIN is a federal crime. If you already own it, go to your state motor vehicle agency or law enforcement rather than fixing it yourself.

Sources

Decode a VIN →