Citroen C1 — MOT statistics 2024

The Citroen C1 failed 30.21% of 230,618 first MOT attempts in 2024 ("first-time", excluding retests). Adjusted for the age of the fleet, its initial-failure ratio is 102.9 (100 = expected for its age profile). This car fails its MOT about 3% more often than expected for its age.

Age-adjusted peer: Ford Mondeo (index 102.5) — the two published results are 0.4 index points apart.

Citroen C1 common problems: what actually fails the MOT

Brakes stand out at 20.6 per 100 tests, against 14.3 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

family vs national — top component groups, per 100 tests. Legend: This family · National avg.

Named defects ranked by how much more often they appear than the national average — not by raw rate.

Citroen C1 MOT advisories: what gets flagged

Brakes are highest at 64 per 100 tests; Non-component advisories are lowest at 5.4 per 100 tests — the gap is 58.6 per 100 tests.

higher bar = flagged more oftenadvisory items per 100 initial tests

Advisories are wear the tester noted but didn't fail — what will need money soon.

How does the Citroen C1 perform as it gets older?

At age 19 stands out at 50.2%, against 42.2% for all cars of the same age.

higher = larger sharecompare shares in percentage points

Chart axes: car age, years · failure-rate scale 0–54%.

Takeaway: a 10-year-old C1 has roughly a 25% chance of failing its MOT; from about age 7 it stays above the national age curve.

Citroen C1 petrol vs diesel: which ages best

Diesel is highest at 48.4%; Petrol is lowest at 30.1% — the gap is 18.3 percentage points.

higher = larger sharecompare shares in percentage points

Chart sample sizes: n=229k · n=1,555.

How dangerous are Citroen C1 MOT failures?

Major defects stand out at 68.6 per 100 tests, against 63.3 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

Chart values: Minor 19.7 · Major 68.6 · Dangerous 13.0.

Per 100 tests on this family. National average: Minor 24.4 · Major 63.3 · Dangerous 12.9 per 100.

Does the month of a Citroen C1 MOT matter?

Nov is highest at 32.2%; Mar is lowest at 28.0% — the gap is 4.2 percentage points.

higher = larger sharecompare shares in percentage points

Chart scale: 23%–34%.

bars: Citroen C1 · dashed: all class-4 cars

Takeaway: the spread between best and worst month is 4.2 percentage points — noticeable seasonality. Seasonality partly reflects registration-date clustering, not weather.

Before reading the shape: most of it is not about cars. Britain changes its registration plates twice a year, and 19.5% of these cars were first registered in March with another17% in September — 37% in two months against the 17% an even spread would give. An MOT falls due three years after first registration, so the buying calendar becomes the testing calendar. Peaks here mark when cars are tested, not when they are worse.

Citroen C1 average mileage by age

At age 8, the middle half of C1s runs from 31,739 miles to 57,415 miles, against 43,348 miles as the median.

further right = more milesmedian is the typical car; band is p25–p75

Chart axes: car age, years · odometer scale 0–124k mi.

Does high mileage mean more Citroen C1 MOT failures?

Same age band (6–14 years), split by odometer — this separates wear from age: 14.9% of the lowest-mileage cars failed versus 54.4% of the highest.

line: median · band: middle half of the fleet (p25–p75)

A typical 8-year-old C1 has ~43,348 miles on the clock. Much more — ask why; much less — check for gaps in the MOT history.

Where in Britain the Citroen C1 fails its MOT most

Edinburgh area is highest at 35.7%; Coventry area is lowest at 24.5% — the gap is 11.2 percentage points.

higher = larger sharecompare shares in percentage points

Toughest areas	% failing	vs model overall
Edinburgh (EH)	35.74%	+5.5 pp
Bristol (BS)	35.27%	+5.1 pp
Cardiff (CF)	35.12%	+4.9 pp
Plymouth (PL)	34.94%	+4.7 pp
Hull (HU)	34.6%	+4.4 pp

Easiest areas	% failing	vs model overall
Coventry (CV)	24.52%	-5.7 pp
Hemel Hempstead (HP)	25%	-5.2 pp
Sheffield (S)	25.04%	-5.2 pp
Chelmsford (CM)	25.28%	-4.9 pp
Preston (PR)	26.4%	-3.8 pp

Why do areas differ?

For each external factor we correlate the area fail rate with the factor across postcode areas that have ≥800 tests of this family, then compare the bottom vs top fifth (quintile) of the factor. Correlation, not causation — factors travel together (the north is colder and often poorer; urban areas are denser and less salted). Road surface condition is joined now, for the 91 English areas the DfT publishes, and it explains nothing: the correlation with suspension failures is −0.01 and with body and structure failures 0.07. Potholes wreck wheels and tyres between tests, but by the time a car reaches the bay the road it drives on leaves no measurable trace.

In areas with the highest mot centre density this model fails 5.4 pp more often than in the lowest fifth (r=0.50, n=93 areas with ≥800 tests).

In areas with the highest road-salt proxy this model fails 3.0 pp more often than in the lowest fifth (r=0.33, n=93 areas with ≥800 tests).

In areas with the highest frost days this model fails 2.1 pp more often than in the lowest fifth (r=0.33, n=93 areas with ≥800 tests).

Values shown in the quintile chart

Factor	Low Q	High Q	Gap	Correlation
MOT centre density	27.3%	32.7%	+5.4 pp	r=0.50
Road-salt proxy	29.6%	32.6%	+3.0 pp	r=0.33
Frost days	30.2%	32.3%	+2.1 pp	r=0.33

Factors that only mean something combined

Some conditions are useless on their own and informative multiplied together. Frost days alone say little — Britain barely freezes. Salt tonnage alone says little — it tracks frost. Distance to the sea alone says little. Multiply the first two and divide by the third and you get an index of how hard an area attacks a car's underside, and it lines up with the corrosion defects we actually record. We built five such combinations and tested each against our own data. Three survived; two did not, and the failures are listed here on purpose — a proxy that was never checked is decoration. One survivor only survived on the second attempt: built from a crude stand-in for street parking it failed outright, and rebuilt from the census — terraced streets carrying more cars than they have driveways — it works, and carries information the salt index does not.

Composite area indicators, each tested against a defect rate we measure

Composite	Built from	Tested against	r	Verdict
Underbody corrosion	frost days × salt load ÷ (distance to coast + 1)	share of tests with a corrosion defect	+0.42	holds (116 areas)
Tyre wear	rain days × annual miles ÷ age at first tyre advisory	share of tests failing on tyres	+0.45	holds (116 areas)
Overnight corrosion	terraced housing × cars per household × frost days	share with a corrosion defect	+0.41	holds (102 areas) — and adds signal beyond the first index
Deferred maintenance	deprivation × advisory-to-failure conversion ÷ labour rate	cars repeating the same advisory	−0.26	fails (118 areas)
Powertrain stress	engine capacity ÷ kerb weight	suspension, brake and emissions failures	−0.16	fails (22 models)

The deprivation result is the one worth dwelling on. The intuition that poorer areas defer repairs is strong enough that most people treat it as established. We tested it twice — once on raw failure rates (r = 0.04) and again, more fairly, on whether an advisory turns into a failure — and it did not hold any of the three times we tried it — on raw failure rates, on advisory-to-failure conversion, and again with deprivation measured properly inside each nation rather than England alone. We are closing it. What does predict local failure rates is the density of test centres, which is a statement about testing, not about cars.

All external-factor correlations (machine-readable)

Factor	r	n areas	Low-Q fail %	High-Q fail %	Gap pp	Low-Q factor	High-Q factor
MOT centre density (per 10k vehicles)	0.497	93	27.3	32.7	+5.4	5.3	8.4
Road-salt proxy (g/m²-yr)	0.334	93	29.6	32.6	+3.0	222.6	620.2
Frost days (days/year)	0.327	93	30.2	32.3	+2.1	11.5	35.2
Urban share (0–1)	-0.289	93	31.9	28.3	-3.6	0.4	0.9
Distance to coast (km)	-0.257	93	31.5	28.9	-2.6	6.2	82.4
Terrain gradient (% grade)	0.182	55	30.3	33.3	+3.0	0.5	3.8
Income deprivation (score)	0.041	82	29.1	29.7	+0.5	0.1	0.2

Deprivation uses England IMD 2019 income score only (Scotland SIMD is a different scale). Salt proxy is a simplified NWSRG-style dry-salt sum from air Tmin; coastalness is distance from the area centroid to the nearest coastline.

Every dot is a postcode area — size = how many were tested there, colour = share failing. These figures are not age-adjusted: coastal and rural areas often run older fleets and salted roads, so higher raw fail rates do not automatically mean a worse local stock of this model.

Map labels: Scotland · N. England · Wales · London · S. West. Colour scale: 25%–36% failing.

Citroen C1 survival: which cars are still on the road

By age 19 stands out at 12.8%, against 100% at the ages 4–6 reference level.

higher = larger sharecompare shares in percentage points

Chart axes: car age, years · survival vs ages 4–6 · scale 0–105%.

By age 19, only about 13% as many cars of this family present for MOT as at ages 4–6 (reference n≈7,388); survivors still fail at 50.2% vs 10.6% at age 4. Older cars that still appear are a selected subset — weaker ones have already left.

How many miles does a Citroen C1 last?

100,000+ miles is highest at 12.8%; 150,000+ miles is lowest at 1.1% — the gap is 11.8 percentage points.

higher = larger sharecompare shares in percentage points

Of 230,549 tests of this family with a usable odometer in 2024, 12.8% had reached 100k miles, 1.1% had reached 150k miles. This is a cross-section of cars still presenting for MOT, not a full birth cohort.

How many years is a Citroen C1 likely to last?

Bought at age 5 is highest at 13.8 years; Bought at age 15 is lowest at 3.5 years — the gap is 10.3 years.

bigger number = longer remaining lifeyears on the observed survival curve

estimateEstimate only — not a warranty: a typical 10-year-old example of this family (~53,612 miles median) has about 8.5 expected years of further MOT-present life on the 2024 survival curve. Derived from how many cars of each age still appear for test, not from a longitudinal panel.

Citroen C1 faults that come together

Body & structure + Emissions & leaks stand out at 12.20×, against 1× if the faults were independent.

above 1.0× = more than expectedbelow 1.0× = less

Defects in «Body, chassis, structure» and «Noise, emissions and leaks» appear together 12.20× more often than chance (2,831 co-occurrences in the same test; lift≥1.3, n≥500).

Lift = how many times more often both groups appear on the same test than if independent. Thresholds: lift ≥ 1.3, co-occurrences ≥ 300.

Is low mileage better for a Citroen C1?

Cars driven under 5,000 miles a year stands out at 20.4%, against 37.6% for cars driven 8,000–12,000 miles a year.

higher = larger sharecompare shares in percentage points

At matched ages 5–14, cars averaging under 5k miles/year fail at 20.4% vs 37.5% for 8–12k miles/year — 17.2 pp lower (n_low=74,106, n_normal=23,217). In this family low annual use is associated with fewer MOT fails, not more — the ‘garage queen’ penalty is not visible in overall fail rates.

Which Citroen C1 engine is best?

petrol 1.0–1.2 is highest at 109.3; petrol under 1.0 is lowest at 98.9 — the gap is 10.4 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Splitting this model by fuel alone hides the thing that actually differs. Within the same badge, the petrol 1.0–1.2 runs at 109.3 against this model's own age norm while the petrol under 1.0 runs at 98.9 — a spread of 10.4 points between two cars that share a name.

Read this one with more care than the rest of the page. Age is held constant, but who buys which engine is not: the largest capacity in a range is often a performance or executive variant that is garaged, cherished and lightly driven, while the smallest is frequently a fleet or entry car worked hard from new. The gap below is real in the test records; how much of it is the engine and how much is the owner, this data cannot separate. Bands under 5,000 tests are not shown.

Best year for a Citroen C1, and the years to avoid

Build year 2008 is highest at 107.2; Build year 2019 is lowest at 82.3 — the gap is 24.9 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

build year vs the same model at the same age · 100 = as expected

The best build year here is 2019 and the weakest is 2008. Comparing build years sounds simple and is not: within a single year of testing, a car's build year and its age are the same number, so a naive comparison of years is a comparison of ages wearing a disguise. Each year below is measured against the same model at the same age in other cohorts, across six years of testing — 14 of 16 years come out distinguishable from their own model's age norm.

Two limits worth knowing before you act on this. Age, test year and build year are locked together by arithmetic, so the test-year effect is taken from the observed national failure level of each year rather than estimated — it is an adjustment, not a solution.

Citroen C1 MOT repair costs

The MOT-failure repair budget per test runs from £108.92 to £206.95, against £54.85 for the test itself.

bigger number = costs morepounds per test, MOT-failing faults only

Multiply how often each component fails on this model by what that repair usually costs, and you get the amount an owner should expect to budget per test for MOT-failing faults only — roughly £109 to £207, on top of the test fee itself. It is a budgeting figure, not a quote: the spread between a set of pads and a set of discs is most of the range.

Prices are modal quotes from a hand-kept catalogue of published UK garage guides — we do not scrape the booking sites, their terms forbid it, so this list is short and updated by hand with a source and date against each line. Each line prices one typical repair in that group, not a full remedy, and only groups our catalogue actually covers are counted. The contrast worth noticing is the second card: the legal maximum for the test has been £54.85 since 2010, while the repairs it uncovers have followed inflation the whole time.

For scale from a different direction: Warrantywise, which sees used-car warranty claims rather than test failures, puts the average claim at £2,052 across the ten highest-claim models it ranks and £539 for Honda, the lowest-claim make in its index (Warrantywise index 2026, 1.6 million claims, cars aged 3–15). Those sit an order of magnitude above the figures in this table, and the gap is the point: a warranty claim is a gearbox or an engine, which almost never fails an MOT, while the faults that do fail one are corrosion, lamps and tyres, which no warranty pays for. The two numbers answer different questions and neither replaces the other.

Citroen C1 running costs for a fleet

Vehicles failing at age 10 stand out at 25%, against 12% at age 5 in the same 100-vehicle fleet.

higher = larger sharecompare shares in percentage points

The number a fleet manager needs is not the failure rate, it is the year the car starts costing more. Between age 10 and 11 the failure rate of this model jumps by 6.22 percentage points — the steepest single step in its life, and the natural planning point for replacement.

Repair spend uses the same modal prices as the section above, so it inherits the same limits: one typical repair per component group, not a full remedy. Downtime is the gap between the failed test and the passed re-test, which is the window a vehicle is legally off the road.

Citroen C1 rust problems: where they corrode

Age-standardised corrosion susceptibility stands out at 2.67×, against 1× for the national age-standardised rate.

above 1.0× = rusts more than averagebelow 1.0× = rusts less

This Citroen C1 fails on corrosion far more often than average once age is held constant, and its owners live in areas that are gentler than most for the models we publish. Those two point in opposite directions, which is the informative case: it rusts more than average despite living in gentler places, so the cause is the car, not the postcode.

Corrosion is the one failure mode that is as much about geography as about the car. We keep the two apart on purpose: a model can look rusty simply because it is popular in Scotland, and a model can look clean simply because it is bought in Surrey. Blending them into a single score would hide which of the two is doing the work.

Exposure is this model's tests weighted by an area corrosion index built from frost days, salt load and distance to the coast — the composite validated at r = 0.42 against corrosion defects we actually record. It is published as a rank, not a raw score, because every mainstream model skews towards low-corrosion areas for the simple reason that most of Britain's cars are in the south. Susceptibility is standardised to the national age profile, so an old fleet does not get labelled a rusty model.

Does a Citroen C1 advisory become a failure?

Lamps, reflectors and electrical equipment are highest at 29.7%; Identification of the vehicle is lowest at 3.1% — the gap is 26.6 percentage points.

higher = more likelypercentage is the observed transition probability

chance the same component fails at the next MOT, given an advisory now

This is the question an advisory note actually raises, and it needs six years of test history to answer. We followed the same vehicles from one MOT to the next across 2019–2024 and measured how often a component that was merely advised came back as a genuine failure at the next test.

Read it as a budgeting horizon, not a prophecy: the most likely component above turns into a failure for about 30 in 100 cars, and the median gap is 12 months and roughly 4,624 miles. The rest were repaired, sold, scrapped, or simply held. Rows with fewer than 500 tracked advisories are not shown.

What will fail next on a Citroen C1?

Lamps, reflectors and electrical equipment after a failure at age 15-19 are highest at 34.6%; Brakes after a passed at age <3 are lowest at 2.2% — the gap is 32.4 percentage points.

higher = more likelypercentage is the observed transition probability

The same chains, cut differently: given a car's age and how its last test went, which component most often causes trouble at the following one.

The pattern that repeats across every family: a failure at one test roughly doubles the chance of a failure on the same component at the next one, and an advisory sits about half-way between a clean pass and a failure. Age bands in years; probabilities are per car, not per defect item.

Citroen C1 ownership: what six years of MOTs show

The same-day re-test pass rate is highest at 50.3%; The later re-test pass rate is lowest at 2.3% — the gap is 48.0 percentage points.

higher = larger sharecompare shares in percentage points

Failing is usually a same-week event, not a disaster. Of 192,555 failures followed through to their re-test, 50.25% were repaired and passed the same day and 47.46% within ten days; the median gap is 0 days. 470,894 defect items were cleared in the process.

Per mile driven, not per year. Dividing failures by the miles that actually went onto the odometers between consecutive tests gives 0.589 failures per 10,000 miles, on a median of 3,954 miles a year across 178,599 chains. This is the number to compare between models — an annual rate quietly rewards cars that barely leave the drive.

Two populations hide inside one model. 36.19% of these cars strung together three or more tests with nothing recorded at all, while 37.84% carried the same advisory three times or more — the same fault, noted, ignored, noted again. When you buy used you are buying one of those two histories, and the MOT record shows which.

Odometer anomalies: 1.177% of 178,662 chains show a reading lower than the previous test, with a median drop of 12,769 miles. We call this an anomaly and not fraud on purpose — instrument swaps, imports, unit mix-ups and keying errors all land in the same bucket. Obvious typos (drops under 100 miles or over 90% of the reading) are already excluded.

Citroen C1 MOT: quick answers

Citroen C1 MOT Risk Index stands out at 102.9, against 100 for a car with the same age profile.

below 100 is betterabove 100 is worse100 = normal for this model at that age

What is the Citroen C1 first-time MOT pass rate?

69.79% of first attempts passed in 2024 (230,618 tests). This is the first-time figure: retests after repair are excluded. Basis: first-time, excluding retests.

Why does this number differ from other sites?

Other sites often report a pass rate that includes retests or counts all attempts. Our 30.21% figure is the first-time initial failure rate, using 230,618 primary tests as the denominator (first-time, excluding retests). The age-adjusted MOT initial-failure ratio 102.9 is shown separately because raw rates compare fleet age as well as cars.

Compare the Citroen C1 with other cars

Hyundai I10 is highest at 103.6; Honda Civic is lowest at 100.7 — the gap is 2.9 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Similar risk

Ford Mondeo (index 102.5)Hyundai I10 (index 103.6)Honda Civic (index 100.7)

Same size class

how Volkswagen Caddy compareshow Audi Q3 compareshow Land Rover Defender compares