Model Reports 8 min read Updated 11 Sep 2026 DVSA open data · 10,477 tests analysed

Citroen C1 2009: reliability & common MOT faults

4,743 first-attempt MOT failures were recorded on the 2009 Citroen C1 in 2025. The items recorded most often on them were Service brake performance (rear) and Position lamp (front). Figures are among first-attempt failed MOT tests, not among all tests.

Petrol C1 passed first time 3.7 pp more often than diesel ones (54.8% of 10,174 vs 51.2% of 301).

First-attempt pass

54.7%

of 10,477 first tests (2025)

First tests

10,477

test year 2025

Failed first attempts

4,743

failed first-attempt tests

Most common fail

16.9%

Service brake performance (rear)

MOT pass rates

First-attempt and official-style rates among class 4 first tests of the year.

First-attempt pass

54.7%

of 10,477 first tests (2025)

Official-style pass

63.2%

incl. same-day PRS fixes

First tests

10,477

class 4 · first MOT of the year

Typical age 16.0 yrs · median mileage 84,389 mi

vs 2024: -0.2 pp first-attempt

Note:

  • Class 4 cars · first MOT of the year per vehicle · P/PRS/F outcomes (2025 data).
  • PRS (fixed at the station the same day) counts as a fail in the first-attempt rate.
  • Raw outcomes for this cohort — not adjusted for age, mileage, or peer mix.
  • MOT doesn't test engine or gearbox internals.

Common faults

Failure patterns that show up more often on this registration year than on similar cars.

These MOT failure patterns show up more often on this registration year than on similar cars of the same class, age, and mileage.

Shares below are measured across the 4,738 of 4,743 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.

Standout: Linkage pins and bushes (front) — 2.8% of this year's failed first attempts

Recorded on 135 of those tests. It tops the table on elevation — about 13× more often than on similar cars of the same age and mileage. That is what makes it unusual for its class, which is a different question from what is most likely to fail; the buying checklist ranks by that. The full ranked list is in the table below.

Fault pattern Location Failures vs similar cars Share of fails Confidence
Linkage pins and bushes (front)
Suspension > Anti-roll bars > Linkage pins and bushes
 Front 135 ×13 2.8% Strong
Hazard warning — Switch
Lamps, reflectors and electrical equipment > Hazard warning > Switch
 Any 117 ×12 2.5% Strong
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Plate brake tester > Service brake performance
 Rear 176 ×5.8 3.7% Strong
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
 Rear 799 ×5.6 16.9% Strong
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
 Rear 339 ×4.0 7.2% Likely
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
 Rear 410 ×3.4 8.7% Likely
Wheel bearings (front)
Suspension > Wheel bearings
 Front 165 ×3.2 3.5% Likely
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
 Rear 173 ×2.8 3.7% Possible
Exhaust system (rear)
Body, chassis, structure > Exhaust system
 Rear 241 ×2.8 5.1% Possible
Rear fog lamp
Lamps, reflectors and electrical equipment > Front and rear fog lamps > Rear fog lamp > Rear fog lamp
 Any 144 ×2.3 3.0% Possible

Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and about 2.0× more often than similar cars).

Note: Rates and comparisons are among first-attempt failed tests, not all MOTs. Patterns come from MOT defect codes — not manufacturer service bulletins, recalls, or a diagnosis of any individual car. Failures and advisories are listed separately.

Advisories

Notes recorded at the test that appear more often than on similar cars.

Advisory notes recorded on failed first-attempt tests that appear more often than on similar cars.

Advisory pattern Location Notes vs similar cars Share Confidence
Linkage pins and bushes (front)
Suspension > Anti-roll bars > Linkage pins and bushes
 Front 502 ×23 10.6% Strong
Pins and bushes (front)
Suspension > Anti-roll bars > Pins and bushes
 Front 102 ×6.5 2.2% Likely
Prescribed areas
Seat belts and supplementary restraint systems > Seat belts > Prescribed areas
 Any 23 ×4.5 0.5% Likely
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
 Rear 849 ×3.8 17.9% Likely
Road Wheels — Condition (front)
Road Wheels > Condition
 Front 250 ×3.6 5.3% Likely
Wheel bearings (front)
Suspension > Wheel bearings
 Front 129 ×3.2 2.7% Likely
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Plate brake tester > Service brake performance
 Rear 83 ×2.7 1.8% Strong
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
 Rear 316 ×2.4 6.7% Strong
Note: Advisories are not a fail rate — they flag issues noted at the test, often before they become failures.

If you are buying one

What this year's MOT record means for the decision in front of you.

On this year, prefer the petrol. The diesel cars passed first time 3.7 pp less often, on 301 tests.

Other C1 years worth knowing about

Newer cars always pass more often, so a plain "best year" list would just rank by age. These are the years that beat or miss the trend their own neighbouring years set — the only age-adjusted signal this data supports.

Year vs the years either side First-attempt pass (rises with newer cars) First tests
2008 C1 -1.8 pp worse 51.7% 8,458

What to check on a 2009 C1

The items that failed 2009 C1 most often, as a share of the year's failed first attempts. This is what goes wrong, not what is unusual — the table further up the page covers that.

  • Service brake performance (rear) — recorded on 16.9% of failed first attempts
  • Position lamp (front) — recorded on 13.7% of failed first attempts
  • Component mounting prescribed areas (rear) — recorded on 8.7% of failed first attempts
  • Catalyst emissions — recorded on 8.6% of failed first attempts
  • Headlamp aim — recorded on 8.3% of failed first attempts

Every figure here is a first-attempt MOT rate from DVSA open data for this model line. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.

FAQs

Short answers about how to read this model-year guide.

Petrol C1 passed first time 3.7 pp more often than diesel ones (54.8% of 10,174 vs 51.2% of 301). In 2025, 54.7% of 10,477 first MOTs on the 2009 Citroen C1 passed first time (PRS — items fixed at the station the same day — counted as a fail). The official-style rate including PRS is 63.2%. Among 4,743 failed first-attempt MOT tests (test year 2025), Linkage pins and bushes (front) appears more often than on similar…
Ranked by how often they were actually recorded, the items that failed 2009 Citroen C1s most often at the first attempt were Service brake performance (rear) (16.9%), Position lamp (front) (13.7%) and Component mounting prescribed areas (rear) (8.7%) — each as a share of the year's failed first attempts. That is what goes wrong on the car. It is a different question from which patterns are unusual for the class, whi…
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Linkage pins and bushes (front) (2.8% of those tests; 135 observed failures; about 13× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Linkage pins and bushes (front) shows up more often than on similar cars (2.8% of those tests; 135 observed failures; about 13× more often than similar cars). That does not prove a design fault — age, mileage, and how the car was used still matter. Treat it as a pre-purchase check point, not a manufacturer service bulletin.
Common MOT problem areas for the 2009 Citroen C1 include Linkage pins and bushes (front), Hazard warning — Switch, Service brake performance (rear). These patterns show up more often than on similar cars after we filter out sparse noise — not a full list of every possible fault on an individual car.
Advisories flag issues noted at the test and are not a fail rate. We show advisory patterns that appear more often than on similar cars among failed first-attempt tests, separate from common failure rows. Use them as early-warning checks, not as a pass/fail score.
This page highlights MOT failure patterns for the 2009 Citroen C1 (registration year) using UK DVSA open data for the selected test year. Patterns are compared with cars of a similar age and mileage. It is a buyer checklist from MOT defect statistics — not a full service history or manufacturer service-bulletin list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.

About this data

How this page is built and what it can (and can't) say.

These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars — not a full reliability score, and not a pass/fail verdict on any individual vehicle.

2024 2025

What we include

UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.

Same-day repairs

PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

How we compare

We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.

What this does not cover

  • MOTs do not cover engine internals, gearboxes, or many electronics — this is not a full reliability score.
  • Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
  • Age and mileage matching reduces — but does not remove — differences in how cars were used and maintained.
  • We never invent pass rates, star scores, or ranks when those data marts are missing.

Contains public sector information licensed under the Open Government Licence v3.0.

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