Dacia Logan
Renault's legendary 1.5 dCi diesel engine (K9K) is considered exceptionally long-lived — 300,000 to 400,000 km with good maintenance are well documented. Early K9K-700 series had injector issues (Delphi); later 800-series variants are considerably more reliable. Strictly observe oil change intervals, as excessively long intervals can lead to con-rod bearing damage.
Economy above all
Only 68 hp from the small diesel — very economical, but also very slow. Recommended only for low-mileage drivers.
Engine Weaknesses 5
Delphi injection system (pre-2006) is particularly troublesome — injectors worn out by 60,000 km. Siemens system (from 2006) is significantly better.
Symptoms: Delphi injection system (pre-2006) particularly problematic — injectors worn out by 60,000 km
Turbocharger can develop play from 60,000 km, especially with short-trip use and no warm-up. Whistling and smoke as symptoms.
Symptoms: Turbocharger can develop play from 60,000 km
Neglected oil changes can cause connecting rod bearing failure — catastrophic engine damage. Regular oil changes every 15,000 km are non-negotiable.
Symptoms: Neglected oil changes can cause connecting rod bearing failure — catastrophic engine damage
DPF clogs when the car is used mostly for short trips. Regeneration fails, engine power is reduced. Regular motorway runs help.
Symptoms: DPF clogs with predominantly short-trip use
EGR valve gets coked up with soot, especially in city traffic. Power loss and increased emissions. Cleaning every 60,000 km recommended.
Symptoms: EGR valve sooted up, especially in city traffic
Vehicle Weaknesses 8
Due to poor paint quality and inadequate corrosion protection, rust forms early on sills, wheel arches, and underbody. Vehicles in salt regions are particularly badly affected.
Recall for affected models due to rust on the rear shock absorber mounts. Structural weakening can compromise driving safety.
Steering and steering joints are among the most frequent MOT complaints. The defect rate is well above average for comparable vehicles.
Brake discs and pads wear faster than average on the Logan I. Regular MOT complaints, braking performance frequently insufficient.
The Logan I's exhaust system is known for early corrosion. A full replacement can be needed after just a few years and regularly causes MOT failures.
The Logan I's low beam shows far above average defect rates at MOT. According to inspection reports, front lighting is up to three times worse than average.
Recall for unreliable ABS warning light failures. The warning light malfunction can delay detection of ABS defects.
The Logan I's interior suffered from cheap plastics and poor panel gaps from the start. Over time, pronounced rattling develops from the dashboard and door panels.
