Last updated: September 2026 – checked against the current Vahan portal and vehicle identification rules.
Your vehicle’s chassis number is its permanent identity: a unique code stamped on the frame at the factory that stays with the vehicle for its whole life, even if the registration number changes. You’ll need it for almost every RTO service, for insurance, and to check a used vehicle before buying. This guide explains where to find the chassis number, what its characters mean, how it’s used on the Parivahan portal, and why a mismatch is a serious warning sign.
What Is a Chassis Number?
The chassis number, also called the Vehicle Identification Number (VIN), is a code assigned by the manufacturer to identify one specific vehicle. For modern vehicles it’s usually 17 characters long, made up of letters and numbers (the letters I, O and Q are normally left out to avoid confusion with 1 and 0). No two vehicles share the same chassis number. It’s different from the engine number, which is stamped on the engine itself and identifies the engine rather than the whole vehicle. Both are recorded on your RC.
Where To Find Your Chassis Number
What the Characters Mean
A 17-character VIN is split into three parts:
| Characters | Part | What it tells you |
|---|---|---|
| 1 to 3 | World Manufacturer Identifier (WMI) | The country and manufacturer. Vehicles made in India typically start with “MA” to “MK”; for example, codes such as MA3 (Maruti Suzuki), MAL (Hyundai) and MAT (Tata Motors). |
| 4 to 9 | Vehicle Descriptor Section (VDS) | Details of the model, body type and engine, coded differently by each manufacturer. |
| 10 to 17 | Vehicle Identifier Section (VIS) | Often includes codes for the model year and the manufacturing plant, followed by the vehicle’s unique serial number. |
Manufacturers use their own coding within these sections, so decoding the details beyond the manufacturer usually requires that company’s reference. For most owners, what matters is that the chassis number matches across the vehicle and every document.
How the Chassis Number Is Used on Parivahan
The public vehicle lookup on Parivahan searches by registration number, not chassis number. There’s no official public service to look up a vehicle using only its chassis number. Instead, the chassis number is used to prove you own the vehicle when you apply for a service:
When you look up a vehicle on Know Your Vehicle Details, the chassis and engine numbers and the owner’s name are partly masked for privacy, so you’ll only see some characters. Your own full chassis number is on your RC. See our guide to vehicle owner details for what the lookup shows.
Why the Chassis Number Matters When Buying a Used Vehicle
Before buying a second-hand vehicle, physically check the chassis number stamped on the vehicle and compare it character by character with the RC. Then check that the last characters shown on the Vahan lookup match too. If the stamped number looks scratched, re-punched, welded over or unevenly spaced, or doesn’t match the paperwork, walk away: tampering with a chassis number is a criminal offence and is a common sign of a stolen or rebuilt vehicle. Our vehicle blacklist check guide covers the other checks worth doing.
If Your Chassis Number Is Wrong on the RC
Occasionally a typing error at registration leaves the RC with a chassis number that doesn’t match the vehicle. This causes problems with insurance, transfers and online services, so get it fixed. Contact the RTO where the vehicle is registered with the vehicle, the RC, the sale invoice and the manufacturer’s documents; the RTO will inspect the vehicle and correct the record. If the insurance policy has the same error, ask your insurer for an endorsement once the RC is corrected.
Frequently Asked Questions
Can I find vehicle details using only the chassis number?
Not through a public service. Parivahan’s vehicle lookup uses the registration number. The chassis number is used to verify ownership for your own vehicle’s services.
Is the chassis number the same as the VIN?
In practice, yes. In India the terms are used interchangeably for the unique identification number stamped on the vehicle’s frame.
Does the chassis number change when a vehicle is re-registered?
No. The registration number can change, for example when a vehicle moves to another state, but the chassis number stays the same for the vehicle’s whole life.
Is it safe to share my chassis number?
Share it only with your insurer, the RTO, a genuine buyer or an authorised service centre. Together with your registration number, it’s used to verify ownership, so avoid posting it publicly.
Related guides: Vehicle RC Status, License Plate Lookup, Vehicle Registration Forms.