Model Reports 4 min read Updated 18 Oct 2026

Citroen C3 2003: reliability & common MOT faults

In 2025, 49 in every 100 first MOTs on a 2003 Citroen C3 were passes. Most common reason for a fail: Suspension mounting area (rear).

Summary

The 2003 Citroen C3 follows the pattern of the model years either side.

At a glance

How 1,848 first tests went in 2025.

Passed first time
49 in every 100
Did not pass first time
51 in every 100941 failed first-attempt tests
The typical car
22 yearsabout 80,087 miles
First tests counted
1,848

What failed most often

  1. Suspension mounting area (rear)16 in every 100 failed tests
  2. Headlight aim12 in every 100 failed tests
  3. Headlight (front)11 in every 100 failed tests

How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.

Note:

These are patterns across 2003 Citroen C3 vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.

Lamps and electrical

Three faults. The strongest is the side repeater indicators: 4.6 times as often as on similar cars.

Figures below are measured across the 941 failed first attempts in 2025 that had a mileage recorded, which allows a like-for-like comparison.

We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.

Side repeater indicators

Failed on 66 first tests4.6 times as often as similar carsLikely evidence

What it means

Sequential or dynamic direction indicators are not a reason to fail. Where a side repeater is required, it is allowed to be part of the front direction indicator if it has a marked wraparound lens, or an amber light coming through the front lens when viewed from a set distance to the side of the rear bumper. A lens defect with no effect on the emitted light is Minor, and one that adversely affects the light is Major.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 40 first tests, 6.7 times as often as on similar cars.

Individual direction indicators (front)

Failed on 60 first tests4.0 times as often as similar carsLikely evidence

What it means

Direction indicators must be amber, though vehicles first used before a set date may have white at the front and red at the rear when the indicators are combined with stop or position lamps, and sequential or dynamic ones are not a reason to fail. A lamp that is missing, inoperative or has more than half of a multiple light source not functioning is graded Major. A flashing rate outside the permitted range is graded Minor.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 41 first tests, 3.0 times as often as on similar cars.

Headlight (front)

Failed on 101 first tests2.2 times as often as similar carsPossible evidence

What it means

On vehicles first used on or after a set date, a halogen headlamp unit converted to take HID or LED bulbs fails for light source and lamp not compatible, which is Major. A complete unit built with those light sources is not failed for that. The precise position of the lamps is not part of the inspection beyond a visual look to see that they sit at about the same height and distance from each side.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Suspension

Four faults. The strongest is the suspension mounting area (rear): 3.0 times as often as on similar cars.

Suspension mounting area (rear)

Failed on 150 first tests3.0 times as often as similar carsPossible evidence

What it means

The load bearing structure within a set distance of a sub-frame, spring or suspension component mounting is a prescribed area. Major applies when its strength or continuity is significantly reduced or it is inadequately repaired. Dangerous applies when it is so weakened that control of the vehicle is likely to be adversely affected.

Coil spring (front)

Failed on 75 first tests2.6 times as often as similar carsPossible evidence

What it means

A missing bump stop rubber is not a reason to fail a coil spring. When the vehicle is jacked and lowered, a spring that does not correctly locate as the suspension returns to its normal running position is rejected as insecurely attached. A missing spring is Major, and graded Dangerous where directional control is affected.

Coil spring (rear)

Failed on 51 first tests2.3 times as often as similar carsPossible evidence

What it means

A missing bump stop rubber is not a reason to fail a coil spring. When the vehicle is jacked and lowered, a spring that does not correctly locate as the suspension returns to its normal running position is rejected as insecurely attached. A missing spring is Major, and graded Dangerous where directional control is affected.

Suspension arm ball joint (front)

Failed on 87 first tests2.2 times as often as similar carsPossible evidence

What it means

A suspension arm ball joint is failed under the general suspension pin, bush or joint wording. Excessively worn is Major, and likely to become detached is graded Dangerous.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Brakes

One fault: brake efficiency below minimum (roller test), 2.4 times as often as on similar cars.

Brake efficiency below minimum (roller test)

Failed on 42 first tests2.4 times as often as similar carsPossible evidence

What it means

Service brake efficiency below the minimum requirement is Major, and efficiency less than half of the required value is graded Dangerous. On a roller brake tester, if more than half of the wheels of a brake system lock, the efficiency requirement for that system counts as met.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Body and structure

Two faults. The strongest is the vehicle structure condition (rear): 2.4 times as often as on similar cars.

Vehicle structure condition (rear)

Failed on 25 first tests2.4 times as often as similar carsPossible evidence

What it means

Structure that is fractured, deformed, corroded, modified or inadequately repaired is failed on rigidity only if the overall structural rigidity of the vehicle is significantly reduced. Structure that is likely to affect steering or braking adversely is graded Dangerous. Prescribed areas are not covered here, as they are checked under other sections, including brakes and steering.

Chassis condition (rear)

Failed on 36 first tests2.4 times as often as similar carsPossible evidence

What it means

A main load-bearing structural member that is fractured, deformed, modified or inadequately repaired is Major when structural rigidity is significantly reduced, and Dangerous where steering or braking is likely to be adversely affected. Corrosion of the body, cab or chassis at a mounting point is Dangerous where overall security or stability is impaired.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Advisories

Other things testers noted as worn or close to failing, more often than on similar cars.

An advisory is a note from the tester about something that has not failed yet. It is an early warning, not a fail. Advisories for the faults above are shown with those faults.

Brake light

Noted on 36 first tests4.1 times as often as similar carsElevated evidence

Anti-roll bar linkage ball joints (front)

Noted on 52 first tests3.4 times as often as similar carsElevated evidence

Individual direction indicators (rear)

Noted on 27 first tests3.4 times as often as similar carsPossible evidence

Data: UK MOT open data, 2025. Counts cover advisories recorded on failed first tests only, compared with cars of the same age and mileage.

MOT pass rates

How first tests ended, and how the pass rates are counted.

Passed first time
49in every 100
Passed on the first test.
Fixed at the station
8in every 100
Failed, then fixed at the test station the same day.
Failed
43in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 49.1% of 1,848 first tests (2025): only cars that passed first time count. Official-style pass 56.9%: cars fixed at the test station also count as a pass. The 8 fixed and the 43 not fixed make the 51 in every 100 that did not pass first time.

Petrol and diesel

First testsPassed first time, as tested
Petrol1,54749
Diesel30148

Figures are in every 100 first tests.

Same model, other years

Passed first time in every 100, all tested in 2025.

4060801002003201020152020
406080100200320102020

Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 48 in every 100 passed first time.

YearPassed first timeFirst tests
200247 in every 100638
2003 This car49 in every 1001,848
200450 in every 1002,335
200550 in every 1002,950
200652 in every 1003,522
200751 in every 1004,080
200850 in every 1003,871
200949 in every 1007,881
201051 in every 10015,915
201153 in every 10013,749
201255 in every 10013,621
201358 in every 10012,592
201461 in every 10013,132
201565 in every 10011,645
201667 in every 1008,425
201771 in every 10014,789
201876 in every 10014,697
201981 in every 10012,988
202087 in every 1007,568
202189 in every 1007,941
202292 in every 1006,874

FAQs

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

The 2003 Citroen C3 follows the pattern of the model years either side. Its main cause of failure was Suspension mounting area (rear), about 16 in every 100 failed tests. In 2025, 49.1% of 1,848 first MOTs on the 2003 Citroen C3 passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 56.9%. Among 941 failed first-attempt MOT tests (test year 2025), Side repeater indicators appears more often than on similar cars (7.0% of those tests; 66 observed failures; about 4.6× more often than similar cars). There is no single reliability score here; this is a pre-purchase checklist built from DVSA open data, not a guarantee for any individual car.
Ranked by how often they were actually recorded, the items that most often failed a 2003 Citroen C3 at the first attempt were Suspension mounting area (rear) (15.9%), Headlight aim (11.8%) and Headlight (front) (10.7%), each as a share of the year's failed first attempts. That is what goes wrong most often on the car. The common faults table shows a different measure: faults that are unusual compared with similar cars.
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Side repeater indicators (7.0% of those tests; 66 observed failures; about 4.6× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Side repeater indicators shows up more often than on similar cars (7.0% of those tests; 66 observed failures; about 4.6× 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 checkpoint, not a manufacturer service bulletin.
Common MOT problem areas for the 2003 Citroen C3 include Side repeater indicators, Individual direction indicators (front), Suspension mounting area (rear). These are the faults that stand out compared with similar cars, not a complete list of what can go wrong on any 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 2003 Citroen C3 (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.
  • If the data for a car is too thin to say anything useful, we say so rather than guess.

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

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