Published Nov 29, 2025 4 Min Read

What Does "Vehicle Class Mismatch" Mean?

A "Vehicle Class Mismatch" occurs when the vehicle details linked to your FASTag do not match the actual class of your vehicle. Each vehicle is assigned a specific class based on its type (e.g., car, truck, or bus), and toll charges are calculated accordingly.

When there is a mismatch, the toll system cannot verify your vehicle's class, leading to payment failures. This issue can arise due to incorrect registration details, applying a FASTag meant for one vehicle on another, or errors during the registration process.

Such mismatches can block your FASTag, cause delays at toll plazas, and result in additional charges if you need to pay in cash. Resolving this issue promptly ensures a hassle-free travel experience.

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Step-by-Step Guide to Fix Vehicle Class Mismatch

If you are facing a vehicle class mismatch issue, follow these steps to resolve it:

1. Log in to the Bajaj Finserv FASTag portal

2. Verify your vehicle details

  • Navigate to the "Manage FASTag" or "Vehicle Details" section.
  • Check the registered details, including the vehicle registration number, class, and type. Ensure they match the details on your Registration Certificate (RC).

3. Update incorrect details

  • If you notice discrepancies, update the details by uploading the correct RC copy.
  • Ensure the uploaded document is clear and legible to avoid rejection.

4. Use the IHMCL FASTag portal if necessary

  • If the issue persists, visit the IHMCL FASTag portal.
  • Log in with your FASTag ID and associated credentials.
  • Follow the instructions to update your vehicle class and details.

5. Contact customer support

  • If the mismatch is not resolved online, reach out to Bajaj Finserv customer support.
  • Provide them with your FASTag ID, vehicle details, and a copy of your RC for verification.

6. Wait for approval

  • Once you submit the updated details, the changes will be reviewed.
  • You will receive a confirmation once the corrections are approved.

Pro Tip: Double-check your RC details before uploading to avoid delays in the approval process.

Understanding the 'One Vehicle, One FASTag' rule

The National Highways Authority of India (NHAI) mandates the "One Vehicle, One FASTag" rule to ensure accuracy and prevent misuse. Each vehicle must have a unique FASTag linked to its registration details.

Using a single FASTag across multiple vehicles can lead to mismatches, toll payment failures, and penalties. To comply with this rule:

  • Purchase a separate FASTag for each vehicle.
  • Ensure the vehicle's registration details match the FASTag information.
  • Deactivate any unused or duplicate FASTags to avoid complications.

By adhering to this rule, you can avoid vehicle class mismatches and ensure smooth toll payments.

What to Do at the Toll Plaza If Your FASTag Fails

If your FASTag fails at a toll plaza due to a vehicle class mismatch, follow these steps:

  1. Use the dedicated FASTag lane to avoid further delays.
  2. Inform the toll operator about the issue.
  3. Pay the toll in cash if necessary. Be aware that cash payments may incur higher charges as per NHAI guidelines.
  4. Always collect a receipt for your cash payment to resolve disputes later.
  5. Contact Bajaj Finserv to report the issue and initiate the resolution process.

Preventive checklist: How to avoid future mismatch issues

Prevention is better than cure. Follow this checklist to avoid FASTag vehicle class mismatches in the future:

  • Verify RC details: Ensure your Registration Certificate details match the information linked to your FASTag.
  • Update KYC promptly: Keep your Know Your Customer (KYC) information up to date to avoid discrepancies.
  • Use only one FASTag per vehicle: Deactivate duplicate or unused FASTags to prevent confusion.
  • Check for errors during registration: Double-check all details when purchasing your FASTag.
  • Monitor your FASTag account: Regularly log in to your Bajaj Finserv FASTag portal to ensure all details are accurate.

By following this checklist, you can minimise the chances of encountering a vehicle class mismatch and enjoy hassle-free toll payments.

Frequently Asked Questions

Can I use my car's FASTag for my other vehicle if I have a class mismatch?

No, you cannot use the same FASTag for multiple vehicles. Each vehicle must have its own FASTag linked to its specific registration details to comply with the "One Vehicle, One FASTag" rule.

Will I be charged a penalty for having an incorrect vehicle class on my FASTag?

Yes, incorrect vehicle class details can lead to toll payment failures, and you may be required to pay higher toll charges in cash. To avoid penalties, ensure your FASTag details are accurate.

Does the vehicle class affect the toll charges deducted from my FASTag?

Yes, toll charges are calculated based on the vehicle class. An incorrect vehicle class may result in incorrect toll deductions or payment failures.

Who is responsible for a class mismatch error, the bank or the vehicle owner?

The vehicle owner is responsible for ensuring that the details provided during FASTag registration are accurate. However, if the error occurred during registration by the bank, you should contact their support team for assistance.

Can I close my current FASTag and get a new one if the mismatch is not resolved?

Yes, you can close your existing FASTag and apply for a new one. Ensure all details are accurate during the registration process to avoid future mismatches.

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