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2017–2021 Citroën C3 (Mk3)

Browse our directory of 2017–2021 Citroën C3 (Mk3) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.

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Common Problems & Reliability

2
Serious
1
Moderate
1
Minor

The 2017–2021 Citroën C3 (Mk3) has 4 known issues. 2 of these are classified as serious faults that could be expensive to repair. 1 are moderate concerns worth inspecting before purchase.

1.2 PureTech "Wet Belt" Degradation

Serious

The 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).

Symptoms: Low oil pressure warning, Hard brake pedal...

Est. repair cost: £600–£1,800

AdBlue Tank and Pump Failure

Serious

The AdBlue system on BlueHDi diesels is prone to pump failure, often requiring a full tank replacement.

Symptoms: "UREA" warning light, Engine won't start countdown

Est. repair cost: £800–£1,300

Exhaust Back Box Detachment

Moderate

The exhaust back box support rod or joint can corrode prematurely, causing the muffler to hang low or detach entirely.

Symptoms: Sudden increase in exhaust noise, Rattling or dragging sound from the rear...

Est. repair cost: £150–£300

Reversing Camera Calibration and Faults

Minor

The factory-fitted reversing camera can lose its calibration guide lines or show a misaligned view of the bumper.

Symptoms: Missing parking guide lines, Camera view appears off-centre or zoomed in...

Est. repair cost: £50–£150

View detailed Citroën C3 (Mk3) fault guide

Buying Tips for the 2017–2021 Citroën C3 (Mk3)

  • ✓CRITICAL: Inspect the PureTech wet belt through the oil filler cap for signs of degradation.
  • ✓Check the touchscreen responsiveness, as it controls almost all interior functions.
  • ✓On diesel models, verify that no AdBlue or "UREA" warning lights are present.

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