Model Reports 8 min read Updated 11 Sep 2026 DVSA open data · 25,465 tests analysed

Citroen C4 2015: reliability & common MOT faults

10,089 first-attempt MOT failures were recorded on the 2015 Citroen C4 in 2025. The items recorded most often on them were Drive shafts — Joints (front) and Ball joint (front). Figures are among first-attempt failed MOT tests, not among all tests.

Petrol C4 passed first time 2.1 pp more often than diesel ones (62.1% of 4,730 vs 60.0% of 20,734).

First-attempt pass

60.4%

of 25,465 first tests (2025)

First tests

25,465

test year 2025

Failed first attempts

10,089

failed first-attempt tests

Most common fail

14.7%

Drive shafts — Joints (front)

MOT pass rates

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

First-attempt pass

60.4%

of 25,465 first tests (2025)

Official-style pass

67.6%

incl. same-day PRS fixes

First tests

25,465

class 4 · first MOT of the year

Typical age 10.0 yrs · median mileage 79,523 mi

vs 2024: -1.3 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 10,068 of 10,089 failed first attempts (99.8%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.

Standout: Drive shafts — Joints (front) — 14.7% of this year's failed first attempts

Recorded on 1,477 of those tests. It tops the table on elevation — about 4.0× more often than on similar cars of the same age and mileage. On this year it is also the commonest failure, so it answers both questions at once. 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
Drive shafts — Joints (front)
Body, chassis, structure > Transmission > Drive shafts > Joints
 Front 1,477 ×4.0 14.7% Likely
Linkage ball joint dust cover (front)
Suspension > Anti-roll bars > Linkage ball joint dust cover
 Front 714 ×3.8 7.1% Likely
Ball joint dust cover (front)
Suspension > Anti-roll bars > Ball joint dust cover
 Front 270 ×3.6 2.7% Likely
Registration plate lamp(s) (rear)
Lamps, reflectors and electrical equipment > Registration plate lamp(s)
 Rear 774 ×3.1 7.7% Likely
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
 Any 207 ×2.5 2.1% 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
Exhaust system (rear)
Body, chassis, structure > Exhaust system
 Rear 378 ×4.1 3.8% Elevated
Flexible brake hoses (rear)
Brakes > Flexible brake hoses
 Rear 158 ×3.1 1.6% Possible
Steering rack
Steering > Steering play > Steering rack
 Any 25 ×2.2 0.2% Elevated
Exhaust system (front)
Body, chassis, structure > Exhaust system
 Front 226 ×2.2 2.2% Possible
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
 Rear 139 ×2.1 1.4% Elevated
Other suspension component (rear)
Suspension > Other suspension component > Other suspension component
 Rear 37 ×2.1 0.4% Elevated
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 2.1 pp less often, on 20,734 tests.

This year also sits 1.0 pp above the midpoint of the 2014 and 2016 cars either side of it — a real break in the model's own run, not the usual year-on-year drift.

Other C4 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
2011 C4 +2.2 pp better 52.5% 5,770
2013 C4 -1.8 pp worse 53.7% 10,925

What to check on a 2015 C4

The items that failed 2015 C4 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.

  • Drive shafts — Joints (front) — recorded on 14.7% of failed first attempts
  • Ball joint (front) — recorded on 8.4% of failed first attempts
  • Registration plate lamp(s) — recorded on 7.7% of failed first attempts
  • Track rod end (front) — recorded on 7.2% of failed first attempts
  • Linkage ball joint dust cover (front) — recorded on 7.1% 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 C4 passed first time 2.1 pp more often than diesel ones (62.1% of 4,730 vs 60.0% of 20,734). In 2025, 60.4% of 25,465 first MOTs on the 2015 Citroen C4 passed first time (PRS — items fixed at the station the same day — counted as a fail). The official-style rate including PRS is 67.6%. Among 10,089 failed first-attempt MOT tests (test year 2025), Drive shafts — Joints (front) appears more often than on simila…
Ranked by how often they were actually recorded, the items that failed 2015 Citroen C4s most often at the first attempt were Drive shafts — Joints (front) (14.7%), Ball joint (front) (8.4%) and Registration plate lamp(s) (7.7%) — 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, which the common-faults ta…
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Drive shafts — Joints (front) (14.7% of those tests; 1,477 observed failures; about 4.0× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Drive shafts — Joints (front) shows up more often than on similar cars (14.7% of those tests; 1,477 observed failures; about 4.0× 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 2015 Citroen C4 include Drive shafts — Joints (front), Linkage ball joint dust cover (front), Ball joint dust cover (front). 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 2015 Citroen C4 (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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