Dacia Logan
More powerful turbo version of the 1.0-litre three-cylinder in LPG operation. No hydraulic tappets — have valve clearance checked every 100,000 km. LPG variant with factory-fitted LPG system; observe 10-year tank re-certification. Keep an eye on the cooling system with a turbocharged engine.
Punchy gas-saver
100 hp with LPG — the ECO-G 100 in the Logan offers a good mix of performance and low running costs.
Engine Weaknesses 7
Timing chain can stretch on the turbocharged variants (TCe) after 120,000–160,000 km. Cold-start rattling is an early warning sign.
Symptoms: Timing chain can stretch on TCe variants after 120,000 km
Valve cover gasket leaks in the spark plug tube area. Same issue as the H4B three-cylinder.
Symptoms: Valve cover gasket leaks in the spark plug tube area
CVT gearbox (X-Tronic) judders at constant speed. A software update may help; otherwise the variator belt is worn.
Symptoms: CVT gearbox (X-Tronic) judders at constant speed
LPG burns hotter than petrol — valve seats wear faster. Check valve clearance every 30,000 km. Hardened valve seats fitted from the factory.
Symptoms: LPG burns hotter than petrol — valve seats wear faster
LPG tanks must be inspected and replaced if necessary after 10 years (mandatory inspection). Internal corrosion from condensation is possible.
Symptoms: LPG tanks must be inspected after 10 years
Landi Renzo LPG injectors foul up over time. Replace the gas filter every 15,000 km. Rough running in LPG mode is a symptom.
Symptoms: Landi Renzo LPG injectors foul up over time
LPG ECU (Landi Renzo) is encrypted — only specialist workshops can read it. Regular Dacia dealers are often unable to diagnose it.
Symptoms: LPG ECU (Landi Renzo) is encrypted — only specialist workshops can read it
Vehicle Weaknesses 5
As with previous models, axle components and steering joints on the Logan III show above-average defect rates at early MOTs — a cross-generation Dacia trait.
The indicator stalk does not reliably cancel after turning in, especially when overtaking. A software update or replacement of the unit can help.
Some vehicles occasionally show an 'Check injection' warning without a permanent fault. Often a software or sensor issue identifiable by diagnostic scan.
Despite the improved platform, sound insulation remains at a low budget level. Wind and road noise penetrate the cabin noticeably at higher speeds.
The third generation still suffers from cost-saving thin paint. Stone chips quickly create rust risk, especially on exposed front sections.
