Quick answer: Wagon R, Ertiga, Celerio and Eeco are the four CNG cars Autoport sees most in Dombivli, Kalyan and along Kalyan-Shilphata Road — and they do not live the same life. A family Wagon R, a school-run Ertiga, an office-commute Celerio and a goods-carrying Eeco wear different parts at different speeds, even though they share the same fuel. Listed Basic Service prices: Wagon R CNG ₹2,249, Ertiga CNG ₹2,389, Celerio CNG ₹1,859, Eeco CNG ₹2,629. Every one of them needs the same legal step — a cylinder hydro-test every three years — and the same kit checks at every service. Autoport India Pvt Ltd is at Desai Naka, opposite Croma (SK Plaza) on Kalyan-Shilphata Road, Dombivli East, open 24x7. Call or WhatsApp +91 72080 15250.
This page is organised car by car, because that is how owners actually think about their car. Instead of one generic CNG explanation, you get the four cars side by side: what each one is used for, which parts it wears first, what its service costs, and when its hydro-test falls due. The shared facts — how a CNG car works, what the kit check covers, what to do if you smell gas — are in our CNG kit checks and safety guide; here, the question is what your particular car needs.
Driving a CNG Wagon R, Ertiga, Celerio or Eeco? Book its CNG service at Desai Naka — open 24x7.
The four cars, side by side: price and use
Before the detail, the comparison that most owners ask for first — what each car is typically used for here, and what its listed Basic Service costs. These are starting prices from our online booking catalog; your exact car's price shows in the booking form before you confirm, and nothing is paid online.
| Car | Typical use around Dombivli | Basic Service (listed) |
|---|---|---|
| Maruti Suzuki Wagon R CNG | Family car, daily city running | ₹2,249 |
| Maruti Suzuki Ertiga CNG | School runs, airport trips, family of six or seven | ₹2,389 |
| Maruti Suzuki Celerio CNG | Office commute, low daily running | ₹1,859 |
| Maruti Suzuki Eeco CNG | Goods and people, all-day running | ₹2,629 |
The price differences are small, but the wear patterns are not. An Eeco that works all day reaches its service interval far sooner than a Celerio used for one office trip a day, and a school-run Ertiga carries a full load twice a day, every day. Book by the manual's interval for your car's CNG version — the CNG version of a model often has its own schedule, so check the CNG section of the manual or the service booklet, not just the petrol pages.
Wagon R CNG: the family car that does a bit of everything
The Wagon R is the default family CNG car in this belt — school drops in the morning, the market in the afternoon, a weekend run to relatives. That mixed life means its service pattern is the most "average" of the four, and the parts that show wear first are the ones this guide keeps coming back to: spark plugs and the air filter. CNG needs a stronger spark to ignite, so plugs wear and their gap widens faster than in petrol cars, which causes misfires, jerks and poor mileage. Many CNG manuals specify a shorter plug inspection or replacement interval than for petrol, and a weak spark is one of the most common reasons a CNG car "feels low on power".
The air filter is the Wagon R's second weak point, because CNG is a gas and the engine is especially sensitive to airflow. A dirty filter hurts pickup quickly, and dust from the construction along Kalyan-Shilphata Road and around Nilje makes it worse. If your Wagon R pulls fine on petrol but feels flat on gas, the filter and the plugs are the two things to check before anything expensive. Read our Wagon R service guide for the model's full service picture.
Ertiga CNG: the loaded car — school runs, airport trips, seven seats full
The Ertiga's life is heavier than the Wagon R's. It carries six or seven people, luggage, and school bags, twice a day, on the same stop-go roads. A loaded car works its clutch harder on every start, its brakes harder on every stop, and its suspension harder over every speed breaker — and on CNG, the engine is already working with a fuel that burns hotter and drier than petrol. That combination is why the Ertiga's service should never be treated as "the same as the Wagon R, just bigger".
Two things deserve particular attention on an Ertiga. First, the CNG filter: many kits have a low-pressure filter (and some a high-pressure filter) that traps oil and dirt from the gas, and a clogged filter causes poor pickup and rough running — which a fully loaded Ertiga feels immediately. Your car's CNG manual carries the replacement intervals for these filters. Second, the cylinder mounting: brackets and straps must be tight, not rusted, not cracked, because a loose cylinder is a serious risk in a collision, and a car that carries children every day is the last place to leave that to chance. The full model picture is in our Ertiga service guide.
Celerio CNG: the office commuter that barely runs — and that is the problem
The Celerio is the cheapest of the four to service — Basic listed at ₹1,859 — and it is also the car most likely to be under-serviced, for a reason that surprises owners: it hardly runs. A Celerio doing one office commute a day, parked the rest of the time, does not rack up kilometres, so owners assume it does not need a service. But oil ages with time as well as kilometres, and a car that does only short trips is actually harder on oil, because moisture and fuel from cold starts collect in it and do not evaporate. Change by the months limit even if the kilometres are low.
The Celerio's other quiet risk is the battery and the changeover. A car that stands for days between short runs never fully recharges its battery, and a car that rarely warms up properly can develop changeover problems — on most kits, warm coolant flows through the pressure regulator to stop it freezing as the gas expands, so low coolant can stop the car switching to CNG at all. If your Celerio sometimes refuses to switch to gas on a cold morning, coolant level is worth checking before anything else. Our Celerio service guide covers the model in full.
Eeco CNG: the workhorse — all-day running, goods and people
The Eeco is the hardest-working of the four. It carries goods and people all day along Kalyan-Shilphata Road, and that changes the service maths completely: it reaches its interval by kilometres long before it reaches it by months, and its kit is used more than any other car's. A choked CNG filter, worn plugs or a tired regulator shows up sooner on an Eeco, and a day off the road costs its owner money — so the Eeco is the car where catching a problem at the periodic service, rather than after a breakdown, matters most.
For an Eeco, the discipline is simple: book by the manual's interval, not the calendar; get the kit checked at every periodic service; and treat any new symptom — jerks only on CNG, weak pickup on gas, the car refusing to switch to CNG — as a same-week booking, not a next-month one. The Eeco also carries loads in the back, so the cylinder mounting and the boot area deserve a look at every service: brackets and straps tight, no rust, no cracks, and no overloading of the boot where the cylinder sits.
The hydro-test: the one legal date every CNG owner must know
This is the one thing every CNG owner must know, whichever of the four cars they drive. Under India's Gas Cylinders Rules, 2016, a CNG cylinder fitted in a vehicle has to be examined and hydrostatically tested every three years. The three-year interval was written into the rules themselves by a 2025 amendment. Maruti Suzuki's CNG manuals set the same three-year re-test, counted from the initial test date shown on the cylinder identification plate and carried out by a government-approved testing agency, and a 20-year life for the cylinder from that date.
What actually happens at a hydro-test: the cylinder is removed and emptied, filled with water and pressurised well beyond normal working pressure. During the test, the station watches how far the cylinder stretches under pressure and whether it springs back, and looks it over for cracks, dents and corrosion. A cylinder that passes gets its new test date stamped on it, and the owner receives a certificate. A cylinder that fails cannot go back into service — it has to be scrapped and a new one fitted.
Why it matters to you, beyond safety: CNG stations can refuse to fill a cylinder without a valid test — several city gas distributors and state authorities have said so publicly — and an expired test can cause problems with insurance claims and when you sell the car. Finding your due date is easy: look at the cylinder identification plate (on many cars it is near the bonnet or door frame; the owner's manual shows where) and at the date stamped on the cylinder neck, then add three years to the last test date. Put it in your phone calendar today.
Only stations recognised by the Chief Controller of Explosives (PESO) are allowed to carry out the hydro-test. During every CNG service at Autoport, the due date is checked and flagged to you in advance, while the mounting, valves and pipes are inspected. The test certificate itself comes from the authorised testing station — no general workshop can issue it.
How a CNG car works, in plain words — and why it changes the service
Most CNG cars in India, including factory-fitted ones like Maruti Suzuki's S-CNG models, are bi-fuel: they can run on petrol or CNG. The cylinder, usually in the boot or under the floor, stores natural gas at very high pressure. A high-pressure pipe carries the gas to the pressure regulator (reducer) in the engine bay. The regulator brings the pressure down and, on most kits, uses warm engine coolant to stop it from freezing as the gas expands. Gas injectors spray the gas into the engine, controlled by the CNG ECU, just as petrol injectors do. A changeover switch on the dashboard lets you choose fuel; many factory cars start on petrol and switch to CNG automatically once warm.
Because the gas is so dry and burns hotter, the engine's spark plugs, valves and valve seats work harder than they do on petrol. That single fact explains most of what is different about a CNG service: the plugs, the filters, the coolant and the valve clearance all carry more of the load. It also explains why a CNG service has extra checks beyond a normal petrol service — a leak test of all joints, valves and pipes (using a leak-detection solution or a gas detector, never a flame), cylinder mounting brackets and straps, the cylinder valve and manual shut-off valve, the high-pressure pipe, the pressure regulator and its coolant hoses, the CNG filters, the gas injectors and wiring, the fuel level gauge and changeover, the refuelling valve, and the compliance plate and cylinder test date, checked and noted.
What a CNG service costs, and what is quoted after inspection
| Service | Starting price |
|---|---|
| Basic Service | Starting ₹1,859 |
| Standard Service | Starting ₹2,589 |
| Premium Service | Starting ₹4,869 |
| General check-up + body foam wash | Starting ₹499 |
| Washing & vacuuming | Starting ₹799 |
| Wheel alignment & balancing (rim wheel) | Starting ₹699 |
| CNG kit repairs (leak, regulator, filter, injector) | Inspection ke baad quote |
Listed Basic Service prices again, because they are the numbers owners actually compare: Wagon R CNG ₹2,249, Ertiga CNG ₹2,389, Celerio CNG ₹1,859, Eeco CNG ₹2,629. CNG kit repairs are quoted after inspection — we inspect first, call you with the estimate, and start only after you say yes. Spare parts are billed at actuals.
What the service packages include
- Basic Service (about 1 hour): engine oil and oil filter change, air and AC filter cleaning, a 25-point general check-up, and top-up of brake oil, coolant and battery water.
- Standard Service: semi-synthetic engine oil, oil and air filter, spark plug / glow plug check, brake cleaning, exterior wash, interior vacuum and polish.
- Premium Service: synthetic oil, all filters, spark plugs, car scanning, AC check-up, wheel alignment and balancing, wash and polish.
Your owner's manual decides the interval; we follow it. Engine oil should be the grade your manual specifies for the CNG version — our engine oil guide explains grades in simple words. Bikes are serviced too — a two-wheeler can be booked the same way, and bike work is quoted after inspection. See our car service price guide for the full listed price list.
Booking a CNG service: call, WhatsApp or book online
- Call or WhatsApp +91 72080 15250, or book online at book.autoport.co.in. Online, you choose the car, the service, the date and a slot. Nothing is paid online.
- Tell us the car, the fuel and the symptom in your own words — Hindi, Marathi or English, sab chalega. Mention "only on CNG" if that is the pattern, and your cylinder test date if you know it.
- Drive in or arrange pick-up & drop — Desai Naka, opposite Croma (SK Plaza) on Kalyan-Shilphata Road. The workshop is open 24x7, so a late-evening drop after office is fine; call ahead so someone is ready for your car.
- Inspection and estimate. For a package, you already know the listed price. For kit work, we inspect first, then tell you what is wrong, what is urgent and what can wait, with the estimate. Extra work is done only after your approval.
- Collect and pay at the workshop after the job. Old parts can be shown to you on request.
Autoport India Pvt Ltd: address, phone and hours
Autoport India Pvt Ltd, Plot 140/1, Desai Naka, Opp. Croma (SK Plaza), Kalyan-Shilphata Road, Sagarli Gaon, Dombivli East, Thane, Maharashtra 421204. This is the Croma at Desai Naka on Kalyan-Shilphata Road — not the Croma on Manpada Road.
- Phone / WhatsApp: +91 72080 15250
- Hours: open 24x7, Monday to Sunday
- Book online: book.autoport.co.in
Get directions to Autoport on Google Maps
More CNG guides
- CNG car service in Dombivli East: kit checks and safety basics
- Wagon R service guide, Dombivli
- Ertiga service guide, Dombivli
- Celerio service guide, Dombivli
FAQs
My Eeco runs all day — how often should it be serviced compared to a family car?
For the Eeco, book by the manual's interval, not the calendar — it reaches the interval by kilometres long before it reaches it by months. The kit check and leak test belong at every periodic service, and any new symptom — jerks only on CNG, weak pickup on gas, refusing to switch to CNG — is a same-week booking, because a day off the road costs a working Eeco owner money.
How do I find out when my CNG cylinder hydro-test is due?
Check the cylinder identification plate (on many cars near the bonnet or door frame — your manual shows where) and the date stamped on the cylinder neck, then add three years to the last test date. Put it in your phone calendar today, and ask for it to be noted on your job card at every service so you are reminded before it falls due.
What happens if my cylinder fails the hydro-test?
Yes. If a cylinder fails the hydro-test it has to be scrapped and a new one fitted — it cannot be repaired back into service. That is also why the test matters beyond safety: CNG stations can refuse to fill a cylinder without a valid test, and an expired test can cause problems with insurance claims and resale.
Why does my Wagon R feel low on power only on CNG?
Most often worn spark plugs or a choked CNG filter, because CNG needs a stronger spark and the engine is very sensitive to airflow. Tell the workshop the pattern — fine on petrol, weak on CNG — and those two are checked first. The air filter and the regulator are the next suspects.
My Celerio barely runs — do I still need to change the oil every year?
A car that does only short trips is actually harder on oil, because moisture and fuel from cold starts collect in it and do not evaporate. Change by the months limit even if the kilometres are low, and follow the manual's severe-service schedule — frequent stop-go traffic and short trips both count as severe use.
What does a CNG service cost for each of these four cars?
Listed Basic Service prices are Wagon R CNG ₹2,249, Ertiga CNG ₹2,389, Celerio CNG ₹1,859 and Eeco CNG ₹2,629. Your exact price shows in the booking form before you confirm. CNG kit repairs are quoted after inspection, with parts billed at actuals.
Written by Shivam Kumar (@visionquantech) for Autoport India Pvt Ltd. Published 10 Nov 2026. General guidance only — your car's owner's manual and an in-person inspection come first.