How reliable is the Mazda 323 compared with other cars?

We do not publish a comparison for the Mazda 323, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 60.1% across 1,082 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.

What do testers most often warn about on a Mazda 323?

The most common advisory is "Brake pipe damaged or excessively corroded", noted on 20.5% of all Mazda 323 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Mazda 323 usually have at its MOT?

The average odometer reading recorded at test is 82,372 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Are most Mazda 323 models petrol or diesel?

Of the Mazda 323 cars tested, 99% are petrol, 1% are diesel. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Mazda 323 MOT pass rate & common failures

From 1,082 recorded MOT tests of the Mazda 323, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 1,082 MOT tests, 60.1% of Mazda 323 tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Mazda 323 fleet does not yet cover a wide enough spread of ages and distances to compare it fairly against other models. Its most commonly recorded failure is strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, which appears in 41.2% of failed tests. Cars of this model average 82,372 miles on the odometer when tested.

At a glance

Recorded pass rate

60.1%unadjusted, not comparable1,082 tests

We are not publishing a ranking for the 323. The examples tested do not cover a wide enough spread of ages and mileages to compare it fairly, and an unadjusted pass rate mostly sorts models by how recently they were bought rather than how well they were built. The failure and advisory patterns below come from the same 1,082 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Mazda 323 tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired41.2%
152 occurrencesSuspension mounting corroded or insecure explained
2.The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired14.6%
54 occurrencesSeat belt anchorage corroded or weakened explained
3.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc10.3%
38 occurrencesSuspension joint dust cover missing or split explained
4.Wiper blade missing or obviously not clearing the windscreen10.3%
38 occurrencesWiper or washer not working properly explained
5.Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced9.8%
36 occurrencesCorrosion in a structural area explained
6.Body, cab or chassis excessively corroded at a mounting point9.5%
35 occurrencesCorrosion in a structural area explained
7.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning8.9%
33 occurrencesLamp not working explained
8.Significant brake effort recorded with no brake applied indicating a binding brake8.4%
31 occurrencesBrake binding or imbalanced across an axle explained
9.Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning7.9%
29 occurrencesStop lamp not working explained
10.A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc7.6%
28 occurrencesDriveshaft CV joint gaiter split or missing explained

Warnings without a failure

Most common advisories

Share of all Mazda 323 tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Brake pipe damaged or excessively corroded20.5%
222 testsBrake pipe corroded explained
2.Tyre tread depth not in accordance with the requirements18.3%
198 testsTyre worn close to the legal limit explained
3.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users18.0%
195 tests
4.A tyre seriously damaged17.3%
187 testsTyre damaged or deteriorated explained
5.The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired12.9%
140 testsSuspension mounting corroded or insecure explained
6.Brake disc or drum excessively weakened, insecure or fractured12.4%
134 testsBrake disc worn, pitted or scored explained
7.A suspension component excessively damaged or corroded12.1%
131 testsSuspension mounting corroded or insecure explained
8.A spring or spring component fractured or seriously weakened11.9%
129 testsRoad spring broken or fractured explained

What gets tested

The 323 fleet

Average mileage recorded at test: 82,372
Fuel mix of tested cars: Petrol99.3%
Diesel0.7%

Check a specific Mazda 323

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Mazda models

Mazda 2 — 69.8% adjusted
Mazda 3 — 70.6% adjusted
Mazda MX-5 — 77.2% adjusted
Mazda CX-5 — 78.5% adjusted
Mazda 6 — 73.3% adjusted
Mazda CX-3 — 83.5% unadjusted
All Mazda models

Common questions

How reliable is the Mazda 323 compared with other cars?: We do not publish a comparison for the Mazda 323, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 60.1% across 1,082 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.
What is the most common MOT failure on a Mazda 323?: The item recorded most often is "The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired", which appears in 41.2% of failed Mazda 323 tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Mazda 323?: The most common advisory is "Brake pipe damaged or excessively corroded", noted on 20.5% of all Mazda 323 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Mazda 323 usually have at its MOT?: The average odometer reading recorded at test is 82,372 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.
Are most Mazda 323 models petrol or diesel?: Of the Mazda 323 cars tested, 99% are petrol, 1% are diesel. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. No adjusted rate is shown because this model's tested examples do not cover enough of the national age and mileage range for standardisation to mean anything.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.