The cheapest factory-LPG crossover in Europe. The ECO-G system is integrated on the production line, not an aftermarket conversion, and offers genuine fuel savings of around 30% over petrol. The H4Dt 3-cylinder turbo engine is shared across Dacia and Renault models and is fundamentally robust, but the LPG system adds specific maintenance items and potential failure points that the petrol-only Duster does not have. Dacia designed the engine for bi-fuel use from the outset, including adapted valve seats and ignition mapping.· more· less
Very low fuel costs on LPGSimple, proven engine platform
LPG system adds failure pointsTurbo sensitive to LPG operation
Buy if: You want the cheapest SUV running costs in Europe and have reliable LPG station access along your regular routes.
Avoid if: You only do short trips under 10 km (LPG system needs warm-up) or there are few LPG stations in your area.
Price & maintenance
Used price
€13,500
median asking price, typically 60,000 km
Typical range€11,900 – €16,100
Kilometres drivenAll
Maintenance cost
€750 – €1,400/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€450 – €750 /yr
Risk bufferunplanned repairs€300 – €650 /yr
Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Ownership costs
Maintenance assumes 15,000 km a year. Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Used price
€13,500
Typically €11,900 – €16,100, at around 60,000 km.
Kilometres driven
Maintenance
€750 – €1,400per year
€450 – €750
service, tyres, brakes
€300 – €650
repair buffer
Price & maintenance
Used price
€16,500
median asking price, typically 50,000 km
Typical range€14,500 – €18,000
Kilometres drivenAll
Maintenance cost
€750 – €1,400/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€450 – €750 /yr
Risk bufferunplanned repairs€300 – €650 /yr
Price estimates are based on French asking prices. Prices and costs vary by vehicle condition and location.
Ownership costs
Maintenance assumes 15,000 km a year. Price estimates are based on French asking prices. Prices and costs vary by vehicle condition and location.
LPG combustion runs hotter, accelerating turbo wear and causing wastegate failure or oil leaks · more· less
The 1.0 TCe turbocharger is the most frequently reported failure on the ECO-G variant. LPG combustion produces higher exhaust gas temperatures than petrol, placing additional thermal stress on the turbo. Many workshops have described this as a pattern defect, with some owners experiencing turbo failure as early as 30,000 km. Symptoms include metallic whistling that increases with revs, blue exhaust smoke after acceleration, P0299 fault codes (insufficient boost), and loss of thrust between 2,000-3,500 rpm. Dacia has released ECU software updates that adjust boost mapping to reduce thermal stress. A wastegate repair or cleaning costs 120-350 euros if caught early. Full turbo replacement runs 700-1,400 euros. Regular oil changes with 5W-30 every 15,000 km (rather than the extended interval) are critical for turbo longevity on LPG.
LPG injector rail coil and seal failure
up to €5002 of 8
Worn injector coils or tips cause cylinders to drop off LPG, forcing petrol switching · more· less
The factory ECO-G system uses dedicated LPG injectors with electromagnetic coils. Over time, these coils and their tip seals degrade, particularly if LPG filters are not replaced on schedule. When an injector fails, the affected cylinder stops receiving LPG and the system forces a switch back to petrol with a dashboard warning. A gas smell in the engine bay or rear is a telltale sign of a rail or seal leak. Replacing all LPG injectors (recommended to do the full set) costs 200-450 euros including calibration. Keeping LPG filters fresh significantly reduces this risk. Dacia UK schedules the gas-phase filter every 18,000 miles and the liquid-phase filter every 36,000 miles, so check the interval printed in your own market's service schedule.
LPG reducer/vaporizer instability when hot
up to €3503 of 8
Reducer pressure becomes unstable at operating temperature, causing lean/rich mixture and rough running on LPG · more· less
The LPG reducer converts liquid LPG to gas before injection. Internal diaphragms and pressure regulators degrade over time, especially under sustained high-temperature operation. Symptoms include rough running, hesitation under acceleration, and P0171/P0172 fault codes (lean/rich mixture) only when running on LPG. The car typically switches to petrol without issue. Some owners have had the reducer replaced under warranty after it was found leaking gas into the inlet manifold. Reducer overhaul or replacement costs 150-300 euros at an LPG specialist. More common after 60,000-80,000 km and in cars driven primarily on LPG with infrequent petrol use.
Timing chain stretch and tensioner wear
up to €1,5004 of 8
Chain stretches and tensioner weakens, typically between 100,000-150,000 km · more· less
The H4Dt uses a thin timing chain designed for 100,000-150,000 km service life. The oil jet lubricating the chain can clog from soot, especially if oil changes are delayed. LPG operation may contribute slightly due to different combustion byproducts. Symptoms include a cold-start rattle lasting several seconds. If the chain skips, catastrophic valve-to-piston contact occurs. Replacement involves the chain, guides, tensioner, and sprockets. The engine has no hydraulic lifters, requiring manual valve clearance adjustment every 60,000 km. Using quality 5W-30 oil and changing it at 15,000 km intervals helps preserve chain life. Independent shop cost: 800-1,000 euros; dealer: up to 1,500 euros.
Cold-weather LPG switching problems
up to €3005 of 8
System fails to switch from petrol to LPG in cold weather, staying on petrol indefinitely · more· less
The ECO-G system requires the engine to reach operating temperature before switching from petrol to LPG. In cold weather (below 10 degrees Celsius), some owners report the system failing to switch at all, remaining on petrol for the entire journey. After several unsuccessful switching attempts, the system locks to petrol mode until the engine is fully stopped and restarted. A faulty MAP sensor has been identified as one cause, with replacement costing around 100-200 euros. In other cases, a software recalibration at the dealer resolves the issue. This is more of an annoyance than a safety concern, as the car drives normally on petrol.
Front suspension knocking and top mount wear
up to €4506 of 8
Shock mounts, drop links, and anti-roll bar bushes wear quickly due to budget suspension tuning · more· less
The Duster's suspension is tuned for off-road capability with generous wheel travel, but this accelerates wear of upper shock absorber mounts, anti-roll bar drop links, and silent blocks. Knocking over potholes and creaking at low-speed turns can appear as early as 15,000-20,000 km. Parts are inexpensive (drop links 15-30 euros per pair, top mounts 30-50 euros each, bushes 5-15 euros), keeping repair costs at 200-450 euros including labor. Budget for replacement every 40,000-60,000 km on rough roads.
Boot and tailgate water ingress
up to €2007 of 8
Water enters the boot through tailgate wiring grommet, keyhole area, or boot seal · more· less
A well-documented Duster Mk2 issue where water enters the boot area through the wiring loom grommet, rear keyhole area, or a poorly fitted boot seal. Water pools under the boot floor, potentially damaging the LPG components and wiring located there. The LPG tank sits under the boot floor in place of the spare wheel, making water ingress particularly problematic on the ECO-G variant. Dacia has addressed this under warranty on many cars. Resealing costs 50-100 euros; if corrosion has started, up to 200 euros.
Infotainment system freezing and rebooting
up to €4008 of 8
Media Nav unit freezes, goes blank, or reboots randomly during use · more· less
The Media Nav infotainment system in the Duster can freeze on the boot logo, experience random reboots, or have an unresponsive touchscreen. Early Mk2 models (2020) are more affected than 2022+ facelift cars with the updated 8-inch unit. A factory data reset may resolve the issue. If the internal NAND memory fails, specialist repair costs 150-250 euros or replacement 300-400 euros. This does not affect driveability but is a persistent annoyance on affected models.
Budget-friendly but the LPG system demands attention
The Duster ECO-G is mechanically the same proven Dacia underneath, but the LPG system introduces failure points that the petrol-only version does not have. The turbocharger is the most concerning component, running hotter on LPG and failing earlier than on petrol models. LPG filter services must not be skipped. Suspension wears fast but is cheap to fix. Most issues are well-documented and can be caught during a thorough pre-purchase inspection. Regular oil changes at 15,000 km intervals with quality 5W-30 oil and keeping LPG filters fresh are the best preventive measures.
Service history
Complete records essential. Verify both standard engine services and LPG-specific filter changes have been performed on schedule.
Tires
Check tread depth, age (date codes on sidewall), and uneven wear patterns indicating suspension issues. Size: 215/65R16.
Cold start
Start engine completely cold on petrol. Listen for timing chain rattle or turbo wastegate metallic noise in the first 30 seconds.
Test drive
Drive for at least 20 minutes. Test switching between petrol and LPG. Check for smooth transitions and stable LPG operation.
Specific for this vehicle
Switch to LPG and drive under load
After engine is warm (5+ minutes), switch to LPG and accelerate firmly. Watch for warning lights, hesitation, rough running, or the system switching back to petrol unexpectedly.
Listen for turbo whistle or rattle
Metallic whistling that increases with revs indicates turbo bearing play. Rattle on deceleration at 2,000-3,000 RPM signals wastegate wear.
Smell for gas around engine bay and rear
Any LPG smell indicates a leak in the rail, injectors, reducer, or tank connections. This is a safety concern.
+ 4 more checksShow less
Check boot floor for moisture
Lift the boot floor carpet and inspect around the LPG tank area. Water ingress near LPG components is particularly problematic.
Test clutch biting point
The biting point should be in the middle of pedal travel. Very low biting point or inconsistency suggests the clutch/flywheel bolt loosening issue known from the Jogger.
Inspect LPG filler valve and tank date
Check the LPG filler point for damage and note the manufacturing date stamped on the tank. Early cars hold 34 litres of usable LPG, the facelift ECO-G 100 holds 49.8 litres. The factory tank is approved to ECE-R67-01, so there is no fixed ten-year replacement in Germany; the ten-year inspection rule covers older tanks without R67 approval.
Verify suspension over rough surfaces
Drive over speed bumps and rough patches. Listen for knocking from the front, indicating worn top mounts and drop links.
Recalls and Technical Service Bulletins
LPG tank welding defect - risk of gas release into the passenger compartment (produced 6 February-3 July 2023)Critical - verify completed
Left curtain airbag deployment issue (produced 21 July 2022)Verify completed
Contact a Dacia dealer with the VIN to check which actions apply to the car in front of you. The LPG tank welding action is the critical one on ECO-G cars and covers vehicles produced between 6 February and 3 July 2023; the curtain airbag action covers cars built on 21 July 2022.
Warranty Status
Factory warranty (3 years / 100,000 km)Expired on 2020-2022 models
LPG system warrantySame as factory warranty (3 years / 100,000 km)
Rust perforation warranty (6 years)Six years from delivery, subject to the required inspections
LPG tank certificationECE-R67-01 approved; no fixed 10-year replacement
Dacia offers 3 years / 100,000 km factory warranty in Europe, covering the LPG system equally. Cars from 2020-2022 are now outside warranty. The factory tank is approved to ECE-R67-01, so the ten-year rule that applies to older tanks without R67 approval is not a scheduled item here; the gas installation is checked at the periodic vehicle inspection instead. Verify remaining warranty status with a Dacia dealer using the VIN.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
