Dacia Duster 1.0 TCe LPG Mk2

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.

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 (gas phase every 18,000 km, liquid phase every 36,000 km) significantly reduces this risk.

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.

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.

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.

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.

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.

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.