Citroën C3
Entry-level variant of the 1.6 HDi with 75 hp. Economical and adequate for city driving, but limited performance reserves. Belt-driven timing, change every 240,000 km or 10 years.
Economy diesel without spark
75 hp 1.6 HDi in the C3 — drives and consumes little, but doesn't excite. Overtaking on the motorway is tight; the power is too little for the car.
Engine Weaknesses 6
Oil sludge and coke deposits block the oil supply passage to the turbo journal bearing. Typical with excessively long oil change intervals. The 75 hp fixed-geometry variant is slightly less affected than the VTG versions.
Symptoms: Whistling noise under acceleration, blue exhaust, noticeably reduced boost, oil loss
Injector copper washers on the DV6-75 can fail and let combustion gases past the injector seat. In the worst case the injector seat seizes, meaning removal is only possible with specialist extraction tools.
Symptoms: Ticking or knocking from the engine, diesel smell, black soot streaks at the injector, misfires
On the 75 hp DV6, the EGR valve and EGR cooler coke up early from heavy urban driving. The car frequently falls into limp mode; a heavily sooted cooler can become porous and let in coolant.
Symptoms: Limp mode, power loss, hesitation at medium load, engine warning light P0401
The DV6-75 particulate filter needs at least 20 minutes of motorway driving for a complete regeneration. Without this the filter loads up with soot; forced regenerations dilute the oil with fuel and raise the oil level.
Symptoms: FAP warning light, oil level rises, engine warning light, strong soot smell from exhaust
The EGR valve on the 1.6 HDi 75 hp clogs with heavy soot deposits and sticks open or closed. After replacement the valve must be calibrated with a PP2000 diagnostic tool, otherwise immediate re-failure occurs.
Symptoms: Power loss, rough engine, fault code P0400 (EGR flow), engine warning light. Increased soot output under acceleration.
The turbocharger shaft seals wear from contaminated oil and sludge in the oil circuit. Oil enters the intercooler and intake system. Continued operation risks turbo damage from oil starvation.
Symptoms: Blue smoke from exhaust particularly under load, oil smell inside the cabin, oil mist in the air filter housing, increased oil consumption above 0.5 L/1,000 km.
Vehicle Weaknesses 5
Vehicles from December 2009 to July 2010 had brake pads that did not meet manufacturer specifications and may have produced insufficient braking force. Faulty ABS/ESP hydraulic components were also fitted.
Springs, shock absorbers and steering joints are flagged above average at the MOT on the C3 II. Worn ball joints and steering joints also regularly cause MOT failures after 5–7 years.
Brake discs on the C3 II wear too frequently and need changing often. The MOT flags the brakes above average across all build years. Older examples also show rusty brake lines.
Headlights, tail lights and indicators are flagged excessively often at the MOT in all build years. On 2010–2011 models, the earth cable to the gearbox can break, causing a sudden engine failure.
Exhaust system rust from the second MOT inspection is a known problem. Doors and bonnet rust from the inside at the flanges, as does the tailgate. Particularly on vehicles without regular cavity protection.
