CNG and LPG Kit Installation โ RTO Approval Process
Switching to CNG or LPG fuel can cut your running costs by 40-60% compared to petrol. But fitting an aftermarket gas kit is not a simple accessory upgrade โ it is a structural modification that requires approval from both the Petroleum and Explosives Safety Organisation (PESO) and the RTO. Here is the complete process to do it legally and safely.
Why RTO Approval Is Mandatory
Installing a CNG or LPG kit changes the fuel type recorded on your Registration Certificate. Under Rule 126 of the Central Motor Vehicles Rules 1989, any modification that alters the particulars in the RC must be endorsed by the registering authority. Driving with an unregistered fuel kit is illegal and can void your insurance coverage entirely.
Beyond legality, safety is a serious concern. An improperly installed gas cylinder in a vehicle poses explosion risks. PESO-certified kits and approved workshops follow strict safety standards that protect you and other road users.
Choosing a Certified Workshop
Only workshops approved by the vehicle manufacturer or authorised by PESO can legally install CNG/LPG kits. Each kit must carry a PESO certification mark and a cylinder test date.
- Check for PESO approval certificate displayed at the workshop
- Verify the gas cylinder has a valid hydro-test date (every 3 years for CNG, 5 for LPG)
- Ensure the kit is compatible with your vehicle engine make and model
- Obtain the installation certificate and cylinder test certificate from the workshop
RTO Endorsement Procedure
After installation, visit your registering RTO within 14 days with the installation certificate and other documents. The RTO will inspect the vehicle, verify the kit installation, and update the fuel type on your RC from Petrol to Petrol/CNG or Petrol/LPG. Some states allow online initiation through the Vahan portal.
Insurance Update After Kit Installation
Inform your motor insurance company immediately after the endorsement. The insurer needs to update the policy to cover the CNG/LPG kit as an add-on. Most insurers charge a small additional premium of โน500-1,500 per year for this. If you skip this step and the kit is damaged in an accident, the insurer can refuse to cover the cost.
Documents Required
- Form 33 โ Notice of alteration to the registering authority
- Original RC โ Registration Certificate of the vehicle
- Installation Certificate โ Issued by the PESO-approved workshop
- PESO Cylinder Certificate โ Shows cylinder test date and certification
- Insurance Policy โ Valid insurance for the vehicle
- PUC Certificate โ Updated PUC for dual-fuel operation
- Invoice of CNG/LPG Kit โ Purchase receipt from the workshop
Approximate Costs for CNG/LPG Conversion
| Component | Approximate Cost |
|---|---|
| CNG Kit + Installation (Car) | โน35,000-65,000 |
| LPG Kit + Installation (Car) | โน25,000-40,000 |
| RTO Endorsement Fee | โน500-1,000 |
| Insurance Add-on Premium | โน500-1,500/year |
| CNG Kit + Installation (Auto) | โน15,000-25,000 |
Important Tips
- Never install a CNG/LPG kit from an uncertified workshop โ it is unsafe and illegal
- CNG cylinders must be hydro-tested every 3 years; mark the date and track it
- The CNG kit adds about 40-60 kg to the vehicle; adjust tyre pressure accordingly
- Some vehicle manufacturers void the engine warranty if a non-approved kit is installed
Key Takeaways
- CNG/LPG kits must be installed only at PESO-certified workshops
- RTO endorsement is mandatory within 14 days of installation via Form 33
- Driving with an unregistered kit is illegal and voids your insurance
- CNG cylinders require hydro-testing every 3 years for safety
- Update your motor insurance to cover the kit โ costs only โน500-1,500 extra per year
Frequently Asked Questions
Can any car be converted to CNG?
Most petrol cars can be converted, but compatibility depends on the engine type and available space for the cylinder. Consult an approved workshop for your specific make and model.
Is CNG safer than LPG?
CNG is lighter than air and disperses quickly in case of a leak, making it generally considered safer. LPG is heavier than air and can pool at ground level. Both are safe when installed and maintained properly.
Will CNG installation void my car warranty?
If you use a kit approved by the vehicle manufacturer and install it at an authorised centre, the warranty usually remains valid. Aftermarket kits from non-approved sources may void certain warranty components.
Conclusion
Converting to CNG or LPG is one of the most practical ways to reduce fuel expenses in India. The key is to use a PESO-certified workshop, get the RC endorsed at your RTO promptly, and update your insurance. Follow these steps and you will enjoy lower running costs without any legal hassles.
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