Check Chassis Number Online: Verify Engine and Chassis Details on Vahan (2026)

A chassis number check online takes just a few minutes: open the Vahan portal, use the Know Your Vehicle Details service, enter your registration number, and compare the chassis and engine numbers in the record with the numbers stamped on your vehicle. This guide gives you the exact steps, shows where the number is physically located on bikes and cars, and explains what to do if the numbers do not match.

What the Chassis Number Actually Is

The chassis number is the unique identity code your vehicle was given at the factory. On modern vehicles it is the same thing as the Vehicle Identification Number, or VIN, a 17-character code of letters and numbers (the letters I, O and Q are left out so nobody confuses them with 1 and 0).

The VIN is not random: the first three characters identify the manufacturer and country, the 10th character shows the model year, and the last six digits are the vehicle’s unique serial number. It stays with the vehicle for its entire life, even if the registration number changes after a transfer or re-registration in another state. That is why the RTO, insurance companies, and used-vehicle buyers all treat it as the vehicle’s real identity.

How to Do a Chassis Number Check Online on the Vahan Portal

A chassis number check online is really a record check: you pull your vehicle’s registration record from the government’s Vahan database and compare the numbers it carries with the numbers on the vehicle. Here is the process on the Vahan portal:

1. Open the Vahan portal at vahan.parivahan.gov.in, the official Vahan NR e-Services site of the Ministry of Road Transport and Highways.
2. Choose Know Your Vehicle Details and sign in with your mobile number.
3. Enter the registration number and captcha exactly as on the number plate, then submit the search.
4. Read the chassis and engine numbers in the record, alongside class, fuel type, manufacturer, registration date, insurance, fitness, and tax status. Signed-in users may be asked for the last five characters of the chassis or engine number for the fuller record, a privacy safeguard against bulk searching.
5. Compare against the physical vehicle. Read the stamped numbers off the frame and engine and match them character by character.

The NextGen mParivahan app offers the same check through RC Search, with a virtual RC showing chassis details. For a deeper background on a vehicle you are thinking of buying, combine this check with a full VAHAN vehicle history report, which pulls the vehicle’s registered history together in one place.

Where the Chassis Number Is Stamped on Your Bike and Car

Documents can be lost, but the stamped number cannot walk away.

On a two-wheeler, look on the steering head tube (the metal neck below the handlebar, turn it fully and use a torch), the front down tube running toward the engine, a frame rail near the engine casing, or a printed VIN sticker under the seat or on the swingarm.

On a car, look at the dashboard plate visible through the bottom of the windshield on the driver’s side, the sticker on the driver-side door pillar, or the engine bay near the firewall.

The engine number is a separate stamp on the engine block or crankcase, usually near the bottom of the casing. Wipe the area clean first, since dust and oil settle there.

If you cannot find the stamp anywhere, check your RC, insurance policy, sale invoice, or PUC certificate, since the chassis number is printed on all of them. A number that is missing from the metal but present on paper is a serious warning sign before any purchase.

Chassis Number vs Engine Number: What Is Different

The chassis number identifies the whole vehicle and never changes. The engine number identifies one specific engine, and it can change if the engine is replaced. Both are recorded on your RC, and when an engine is replaced, the new engine’s number must be endorsed on the RC through the registering authority. A vehicle whose engine number does not match the RC is not automatically a fraud case, but the paperwork needs fixing before the next ownership transfer or insurance claim.

How to Verify the Numbers Before Buying a Used Vehicle

Follow this order: record first, metal second. Pull the registration record first so you know what numbers the official record carries, then read the metal against it.

1. Run the chassis number check online on the Vahan portal and note the chassis and engine numbers exactly as they appear.
2. Read the stamped chassis number off the frame and the engine number off the engine block, character by character, in good light.
3. Compare them with the physical RC and, for a used vehicle, with the insurance policy and sale invoice. The vehicle registration details record is the reference point, and everything else should line up with it.

What to Do If the Numbers Do Not Match

Off by one character or digit: usually a data-entry error from the dealership or the RTO at first registration. Visit the registering authority, the RTO that issued your RC, with your original invoice, the RC, and an affidavit stating the correct number, and the error is corrected in the record.

Engine number differs after an engine replacement: the new engine’s number must be reported to the registering authority and endorsed on the RC, with the replacement engine’s bill or proof of purchase and a physical inspection of the vehicle. An unreported engine change surfaces as a mismatch at the next ownership transfer.

Stamp looks ground away or re-marked: walk away from any purchase and report it to the RTO or the police. The registering authority will not process an ownership transfer where the stamped number is unreadable or tampered with. A seller who cannot show you a readable chassis stamp and a matching RC is a reason to leave, not a negotiation.

To compare against the official record before visiting the RTO, use the Know Your Vehicle Details service on the Parivahan Sewa portal.

How to Spot a Tampered or Fake Chassis Number

Fraudsters re-mark chassis numbers to hide theft, clone plates, or disguise a written-off vehicle. Look for these signs: grinding or sanding marks around the stamp, inconsistent lettering (factory stamps use one uniform font and depth), fresh paint or weld over the stamp, and documents where the chassis number differs from the stamp.

Report suspected tampering to the RTO or the local police, since a re-marked chassis number is a classic marker of a stolen vehicle.