Citroën C3 (Mk3)
The third-generation C3 arrived in UK showrooms in early 2017 as Citroen's characterful supermini, mixing a raised ride height, optional Airbump panels and a bright, customisable cabin with the practical five-door shape buyers expected. It shares its PF1 underpinnings with the Peugeot 208 and DS 3, and the UK range centred on the 1.2 PureTech petrol, with 1.6 and then 1.5 BlueHDi diesels for longer-distance users. The 2020 facelift brought sharper LED lighting and a revised cabin, and the car stayed on sale as the C3 Origin after the fourth-generation model arrived. Reliability is dominated by the PureTech engine's oil-bathed timing belt, which needs the correct oil and a strict replacement interval; neglected examples can suffer oil starvation and brake-assistance loss. Elsewhere it is a simple, light car with cheap consumables, though the touchscreen controls most functions and cabin trim wears in hard family use. A late, well-documented car is the safest buy.
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Common Faults & Reliability
These are the most common documented problems for the Citroën C3 (Mk3), sorted by their typical impact and frequency.
1.2 PureTech "Wet Belt" Degradation
high severityThe timing belt runs in oil and can degrade, shedding debris that blocks the oil pickup. This leads to oil starvation, vacuum pump failure, and a dangerous loss of braking assistance (Recall R/2020/331).
AdBlue Tank and Pump Failure
high severityThe AdBlue system on BlueHDi diesels is prone to pump failure, often requiring a full tank replacement.
Exhaust Back Box Detachment
medium severityThe exhaust back box support rod or joint can corrode prematurely, causing the muffler to hang low or detach entirely.
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