Model Reports 8 min read Updated 11 Sep 2026 DVSA open data · 5,437 tests analysed

Mazda 6 2014: reliability & common MOT faults

1,731 first-attempt MOT failures were recorded on the 2014 Mazda 6 in 2025. The items recorded most often on them were Ball joint (front) and Coil spring (rear). Figures are among first-attempt failed MOT tests, not among all tests.

Petrol 6 passed first time 5.0 pp more often than diesel ones (71.9% of 1,381 vs 66.9% of 4,056).

First-attempt pass

68.2%

of 5,437 first tests (2025)

First tests

5,437

test year 2025

Failed first attempts

1,731

failed first-attempt tests

Most common fail

20.0%

Ball joint (front)

MOT pass rates

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

First-attempt pass

68.2%

of 5,437 first tests (2025)

Official-style pass

72.3%

incl. same-day PRS fixes

First tests

5,437

class 4 · first MOT of the year

Typical age 11.0 yrs · median mileage 100,052 mi

vs 2024: -2.7 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 1,731 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.

Standout: Parking brake performance (rear) — 4.0% of this year's failed first attempts

Recorded on 70 of those tests. It tops the table on elevation — about 4.9× 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
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
 Rear 70 ×4.9 4.0% Likely
Rigid brake pipes (front)
Brakes > Rigid brake pipes
 Front 40 ×3.7 2.3% Likely
Ball joint (front)
Suspension > Suspension arms > Ball joint
 Front 347 ×3.0 20.0% Possible
Coil spring (rear)
Suspension > Springs > Coil springs > Coil spring
 Rear 247 ×2.9 14.3% Possible
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
 Rear 46 ×2.8 2.7% Possible
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
 Any 206 ×2.6 11.9% Possible
Diesel emissions test (compression-ignition rules for vehicles from 01/01/2014) Any 78 ×2.5 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
Anti-roll bars — Linkage (rear)
Suspension > Anti-roll bars > Linkage
 Rear 20 ×76 1.2% Elevated
Suspension arm (rear)
Suspension > Suspension arms > Suspension arm
 Rear 190 ×7.4 11.0% Elevated
Sub-frame (rear)
Suspension > Sub-frames > Sub-frame
 Rear 157 ×4.5 9.1% Elevated
Suspension arm (front)
Suspension > Suspension arms > Suspension arm
 Front 41 ×3.8 2.4% Elevated
Rigid brake pipes (front)
Brakes > Rigid brake pipes
 Front 103 ×2.9 6.0% Likely
Sub-frame (front)
Suspension > Sub-frames > Sub-frame
 Front 67 ×2.4 3.9% Elevated
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
 Rear 110 ×2.3 6.4% 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.

On this year, prefer the petrol. The diesel cars passed first time 5.0 pp less often, on 4,056 tests.

What to check on a 2014 6

The items that failed 2014 6 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.

  • Ball joint (front) — recorded on 20.0% of failed first attempts
  • Coil spring (rear) — recorded on 14.3% of failed first attempts
  • Rbt (sp) — recorded on 11.9% of failed first attempts
  • Position lamp (front) — recorded on 8.9% of failed first attempts
  • Tyres — Condition (rear) — recorded on 5.8% 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 6 passed first time 5.0 pp more often than diesel ones (71.9% of 1,381 vs 66.9% of 4,056). In 2025, 68.2% of 5,437 first MOTs on the 2014 Mazda 6 passed first time (PRS — items fixed at the station the same day — counted as a fail). The official-style rate including PRS is 72.3%. Among 1,731 failed first-attempt MOT tests (test year 2025), Parking brake performance (rear) appears more often than on similar ca…
Ranked by how often they were actually recorded, the items that failed 2014 Mazda 6s most often at the first attempt were Ball joint (front) (20.0%), Coil spring (rear) (14.3%) and Rbt (sp) (11.9%) — 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: Parking brake performance (rear) (4.0% of those tests; 70 observed failures; about 4.9× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Parking brake performance (rear) shows up more often than on similar cars (4.0% of those tests; 70 observed failures; about 4.9× 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 2014 Mazda 6 include Parking brake performance (rear), Rigid brake pipes (front), Ball joint (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 2014 Mazda 6 (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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