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CNG Kit Fitting for Taxi in Delhi – Cost, Rules & Best Centres 2026

Buy Sell Taxi Team·7 April 2026·6 min read

Converting your taxi to CNG in Delhi can save ₹8,000–₹12,000 per month in fuel costs. Here's everything you need to know about the CNG kit fitting process in 2026.

Converting a petrol taxi to CNG in Delhi is one of the best investments a commercial vehicle operator can make. With running costs dropping from ₹6–7.5 per km to ₹3.5–4.5 per km, a CNG conversion pays for itself within 3–5 months of operation. However, not all CNG kits are equal — the certification and fitment quality are critical for safety and legal compliance.

Types of CNG Kits Available in Delhi

Sequential CNG systems (SLS/MPFI): Best for modern fuel-injected engines. Maintains engine performance on both fuels. Cost: ₹22,000–₹32,000 installed.
Single-point injection (venturi type): Older technology, works on carburettor engines. Lower cost but lower performance. Cost: ₹14,000–₹20,000 installed.
Factory S-CNG (Maruti iCNG, Hyundai S-CNG): Best option — but only available on new vehicle purchase, not retrofits.

AIS-137 Certification: Why It Matters

Any CNG kit fitted to a Delhi taxi MUST be AIS-137 certified. This is the Bureau of Indian Standards certification for automotive CNG systems. Uncertified kits fail Delhi's PUC checks, are illegal for commercial vehicles, and void insurance in case of an accident. Always demand the AIS-137 certificate from the fitment centre before proceeding.

Best CNG Fitment Centres in Delhi (2026)

Lovato/Tomasetto dealers in Wazirpur Industrial Area: Established importers with AIS-137 certified kits
Indane Gas CNG dealers across Delhi: BPCL authorised fitment centres with certified kits
IGL (Indraprastha Gas) authorised stations: Delhi's primary CNG network also offers conversion services
Rohini Sector 5 and Dwarka Sector 11 auto service clusters: Multiple authorised CNG fitment shops
Maruti Suzuki authorised workshops (Karol Bagh, Okhla): For Maruti vehicles specifically

RC Endorsement After CNG Fitment in Delhi

After fitting a CNG kit, you must update your vehicle's RC at the Delhi RTO to reflect the dual-fuel (petrol/CNG) status. This is mandatory for commercial vehicles. Submit the AIS-137 certificate, fitment invoice, and Form 20 at your nearest Delhi RTO. The RC endorsement is issued within 7–14 days and the PUC certificate must reflect CNG compliance from that point.

Frequently Asked Questions

How much does a CNG kit cost in Delhi for a taxi?

A complete AIS-137 certified CNG kit installation for a commercial taxi in Delhi costs ₹18,000–₹32,000 depending on the kit type and vehicle. Sequential systems (for modern fuel-injected engines like Dzire, Xcent) cost more but maintain engine performance better.

How long does CNG kit fitting take in Delhi?

Installation takes 6–8 hours at a professional fitment centre. Most Delhi centres complete the work in a single day. The RC endorsement at the RTO takes an additional 7–14 days.

Is it safe to fit a CNG kit on an old taxi?

It depends on the engine condition and kit quality. An AIS-137 certified kit on a mechanically sound engine is safe. Do not convert vehicles with compression issues or worn engine seals — CNG requires higher engine integrity than petrol.

How often must the CNG cylinder be checked after fitting?

CNG cylinders must undergo a hydrostatic pressure test every 3 years. This test verifies cylinder integrity and is mandatory for commercial vehicle PUC compliance in Delhi. The test costs ₹1,500–₹2,500 at authorised testing stations.

Does fitting a CNG kit affect my vehicle warranty in Delhi?

For aftermarket kits on vehicles still under manufacturer warranty: yes, it may void the engine warranty. Factory S-CNG vehicles (Maruti iCNG) are the exception — they maintain full warranty. For commercial taxis well past their warranty period, this is not a concern.

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