Model Reports 8 min read Updated 11 Sep 2026 DVSA open data · 3,686 tests analysed

Citroen C1 2006: reliability & common MOT faults

1,812 first-attempt MOT failures were recorded on the 2006 Citroen C1 in 2025. Figures are among first-attempt failed MOT tests, not among all tests.

Position lamp (front) was the most common reason a 2006 C1 failed its MOT — 14.0% of its failed first attempts.

First-attempt pass

50.8%

of 3,686 first tests (2025)

First tests

3,686

test year 2025

Failed first attempts

1,812

failed first-attempt tests

MOT pass rates

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

First-attempt pass

50.8%

of 3,686 first tests (2025)

Official-style pass

59.5%

incl. same-day PRS fixes

First tests

3,686

class 4 · first MOT of the year

Typical age 19.0 yrs · median mileage 95,488 mi

vs 2024: +1.0 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 1,811 of 1,812 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.

Standout: Hazard warning — Switch — 3.6% of this year's failed first attempts

Recorded on 66 of those tests. It tops the table on elevation — about 14× 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.

No patterns met the strongest callout thresholds on this page; showing the highest-lift rows that still cleared the display floors.

Fault pattern Location Failures vs similar cars Share of fails Confidence
Hazard warning — Switch
Lamps, reflectors and electrical equipment > Hazard warning > Switch
 Any 66 ×14 3.6% Likely
Linkage pins and bushes (front)
Suspension > Anti-roll bars > Linkage pins and bushes
 Front 70 ×11 3.9% Likely
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
 Rear 188 ×3.8 10.4% Likely
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Plate brake tester > Service brake performance
 Rear 40 ×3.7 2.2% Likely
Integral vehicle structure condition (rear)
Body, chassis, structure > Integral vehicle structure > Integral vehicle structure condition
 Rear 46 ×2.6 2.5% Possible
Chassis condition (rear)
Body, chassis, structure > Chassis > Chassis condition
 Rear 59 ×2.5 3.3% Possible
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
 Rear 202 ×2.4 11.2% Possible
Wheel bearings (rear)
Suspension > Wheel bearings
 Rear 62 ×2.4 3.4% Possible
Exhaust system (rear)
Body, chassis, structure > Exhaust system
 Rear 89 ×2.2 4.9% Possible
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Emissions not tested
 Any 82 ×2.2 4.5% 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 260 ×20 14.4% Likely
Road Wheels — Condition (front)
Road Wheels > Condition
 Front 120 ×4.6 6.6% Elevated
Pins and bushes (front)
Suspension > Anti-roll bars > Pins and bushes
 Front 47 ×4.4 2.6% Elevated
Road Wheels — Condition (rear)
Road Wheels > Condition
 Rear 56 ×3.2 3.1% Elevated
Swivel pins and bushes (rear)
Suspension > Axles > Swivel pins and bushes
 Rear 72 ×2.8 4.0% Elevated
Pins and bushes (rear)
Suspension > Sub-frames > Pins and bushes
 Rear 21 ×2.4 1.2% Elevated
Sub-frame (front)
Suspension > Sub-frames > Sub-frame
 Front 137 ×2.3 7.6% Elevated
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
 Rear 132 ×2.3 7.3% Possible
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.

Nothing separates this year from the C1 either side of it, so buy on the individual car. The checks below are the items that actually failed 2006 C1, commonest first.

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 2006 C1

The items that failed 2006 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.

  • Position lamp (front) — recorded on 14.0% of failed first attempts
  • Headlamp aim — recorded on 14.0% of failed first attempts
  • Catalyst emissions — recorded on 11.8% of failed first attempts
  • Component mounting prescribed areas (rear) — recorded on 11.2% of failed first attempts
  • Service brake performance (rear) — recorded on 10.4% 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.

Position lamp (front) was the most common reason a 2006 C1 failed its MOT — 14.0% of its failed first attempts. In 2025, 50.8% of 3,686 first MOTs on the 2006 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 59.5%. Among 1,812 failed first-attempt MOT tests (test year 2025), Hazard warning — Switch appears more often than on si…
Ranked by how often they were actually recorded, the items that failed 2006 Citroen C1s most often at the first attempt were Position lamp (front) (14.0%), Headlamp aim (14.0%) and Catalyst emissions (11.8%) — 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, which the common-faults table answers.
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Hazard warning — Switch (3.6% of those tests; 66 observed failures; about 14× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Hazard warning — Switch shows up more often than on similar cars (3.6% of those tests; 66 observed failures; about 14× 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 2006 Citroen C1 include Hazard warning — Switch, Linkage pins and bushes (front), 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 2006 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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