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Citroen C1 jcc + vs Citroen C4: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Citroen C1 jcc +
90%
MOT pass rate · 623 vehicles
More reliable
Citroen C4
72%
MOT pass rate · 236,872 vehicles
Verdict: On MOT pass rate, the Citroen C1 jcc + is the more reliable of the two — 90% pass first time versus 72%. It's one signal among several; check the full breakdown below.

Head to head

Measure Citroen C1 jcc + Citroen C4
MOT pass rate 90% ✓ 72%
MOT failure rate 10% ✓ 28%
Faults & advisories per test 1.0 ✓ 2.0
Dangerous-fault share 5% 3% ✓
Average mileage 24,846 mi 100,675 mi
Sample size (vehicles) 623 236,872

Most common faults

Citroen C1 jcc +

  1. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  2. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  3. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  6. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))

Citroen C4

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  4. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate, the Citroen C1 jcc + is the more reliable of the two — 90% pass first time versus 72%. It's one signal among several; check the full breakdown below.

Full Citroen C1 jcc + report Full Citroen C4 report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.