Model Reports 8 min read Updated 11 Sep 2026 DVSA open data · 715 tests analysed

Mazda 5 2012: reliability & common MOT faults

311 first-attempt MOT failures were recorded on the 2012 Mazda 5 in 2025. Figures are among first-attempt failed MOT tests, not among all tests.

Diesel 5 passed first time 5.2 pp more often than petrol ones (59.6% of 302 vs 54.4% of 412).

First-attempt pass

56.5%

of 715 first tests (2025)

First tests

715

test year 2025

Failed first attempts

311

failed first-attempt tests

MOT pass rates

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

First-attempt pass

56.5%

of 715 first tests (2025)

Official-style pass

63.4%

incl. same-day PRS fixes

First tests

715

class 4 · first MOT of the year

Typical age 13.0 yrs · median mileage 100,500 mi

vs 2024: -3.2 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 311 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.

Standout: Linkage ball joints (rear) — 6.8% of this year's failed first attempts

Recorded on 21 of those tests. It tops the table on elevation — about 13× more often than on similar cars of the same age and mileage. 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
Linkage ball joints (rear)
Suspension > Anti-roll bars > Linkage ball joints
 Rear 21 ×13 6.8% Possible
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
 Any 33 ×3.9 10.6% Likely
Linkage ball joints (front)
Suspension > Anti-roll bars > Linkage ball joints
 Front 29 ×3.1 9.3% Possible
Pins and bushes (front)
Suspension > Suspension arms > Pins and bushes
 Front 40 ×2.6 12.9% Possible
Shock absorbers (rear)
Suspension > Shock absorbers
 Rear 21 ×2.3 6.8% 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 ball joints (rear)
Suspension > Anti-roll bars > Linkage ball joints
 Rear 33 ×13 10.6% Possible
Suspension arm (rear)
Suspension > Suspension arms > Suspension arm
 Rear 25 ×4.0 8.0% Elevated
Sub-frame (rear)
Suspension > Sub-frames > Sub-frame
 Rear 40 ×3.0 12.9% Elevated
Exhaust system
Body, chassis, structure > Exhaust system
 Any 23 ×2.8 7.4% Elevated
Brake pads (rear)
Brakes > Mechanical brake components > Brake linings and pads > Brake pads
 Rear 29 ×2.0 9.3% Wear
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 diesel. The petrol cars passed first time 5.2 pp less often, on 412 tests.

Other 5 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 5 +6.0 pp better 58.2% 699
2008 5 +5.4 pp better 49.8% 1,307

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.

Diesel 5 passed first time 5.2 pp more often than petrol ones (59.6% of 302 vs 54.4% of 412). In 2025, 56.5% of 715 first MOTs on the 2012 Mazda 5 passed first time (PRS — items fixed at the station the same day — counted as a fail). The official-style rate including PRS is 63.4%. Among 311 failed first-attempt MOT tests (test year 2025), Linkage ball joints (rear) appears more often than on similar cars (6.8% of th…
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Linkage ball joints (rear) (6.8% of those tests; 21 observed failures; about 13× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Linkage ball joints (rear) shows up more often than on similar cars (6.8% of those tests; 21 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 2012 Mazda 5 include Linkage ball joints (rear), Catalyst emissions, Pins and bushes (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 2012 Mazda 5 (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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