How reliable is the Aston Martin Dbx compared with other cars?

We do not publish a comparison for the Aston Martin Dbx, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 93.4% across 910 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 Aston Martin Dbx?

The item recorded most often is "A tyre seriously damaged", which appears in 44.4% of failed Aston Martin Dbx 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 Aston Martin Dbx?

The most common advisory is "A tyre seriously damaged", noted on 11.6% of all Aston Martin Dbx tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Aston Martin Dbx usually have at its MOT?

The average odometer reading recorded at test is 24,724 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.

Model reliability file

Aston Martin Dbx MOT pass rate & common failures

From 910 recorded MOT tests of the Aston Martin Dbx, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 910 MOT tests, 93.4% of Aston Martin Dbx tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Aston Martin Dbx 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 tyre seriously damaged, which appears in 44.4% of failed tests. Cars of this model average 24,724 miles on the odometer when tested.

At a glance

Recorded pass rate

93.4%unadjusted, not comparable910 tests

We are not publishing a ranking for the Dbx. 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 910 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

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

1.A tyre seriously damaged44.4%
20 occurrencesTyre damaged or deteriorated explained
2.A tyre cords visible or damaged20.0%
9 occurrencesTyre ply or cord exposed, or the casing separating explained
3.A tyre seriously damaged17.8%
8 occurrencesTyre damaged or deteriorated explained
4.Tyre tread depth not in accordance with the requirements15.6%
7 occurrencesTyre worn close to the legal limit explained
5.Number plate does not conform to the specified requirements13.3%
6 occurrencesRegistration plate missing, insecure or illegible explained
6.A tyre has a lump, bulge or tear caused by separation or partial failure of its structure. This includes any lifting of the tread rubber11.1%
5 occurrencesTyre ply or cord exposed, or the casing separating explained
7.A tyre seriously damaged4.4%
2 occurrencesTyre damaged or deteriorated explained
8.A brake lining or pad worn below 1.5mm4.4%
2 occurrencesBrake drum or shoe worn or contaminated explained
9.Windscreen washers not working or not providing sufficient fluid to clear the windscreen4.4%
2 occurrencesWiper or washer not working properly explained
10.The aim of a headlamp is not within limits laid down in the requirements2.2%
1 occurrencesHeadlamp aim incorrect explained

Warnings without a failure

Most common advisories

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

1.A tyre seriously damaged11.6%
103 testsTyre damaged or deteriorated explained
2.Tyre tread depth not in accordance with the requirements10.9%
97 testsTyre worn close to the legal limit explained
3.Tyre tread depth not in accordance with the requirements2.9%
26 testsTyre worn close to the legal limit explained
4.Brake disc or drum excessively weakened, insecure or fractured2.7%
24 testsBrake disc worn, pitted or scored explained
5.A brake lining or pad worn below 1.5mm2.6%
23 testsBrake drum or shoe worn or contaminated explained
6.A tyre seriously damaged2.4%
21 testsTyre damaged or deteriorated explained
7.A tyre seriously damaged2.3%
20 testsTyre damaged or deteriorated explained
8.Nail in tyre2.3%
20 tests

What gets tested

The Dbx fleet

Average mileage recorded at test: 24,724
Fuel mix of tested cars: Petrol100.0%

Trim names grouped into this model (2)

Recorded exactly as DVSA holds them. Trim-level names are rolled up so one model is not split across a dozen thin pages.

DBX V8
DBX V8 AUTO

Check a specific Aston Martin Dbx

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

Compare within the range

Other Aston Martin models

Aston Martin Vantage — 93.7% unadjusted
Aston Martin DB9 — 90.1% unadjusted
Aston Martin V8 Vantage — 91.4% unadjusted
Aston Martin DB11 — 95.1% unadjusted
Aston Martin DB7 — 86.0% unadjusted
Aston Martin Dbs — 94.0% unadjusted
All Aston Martin models

Common questions

How reliable is the Aston Martin Dbx compared with other cars?: We do not publish a comparison for the Aston Martin Dbx, 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 93.4% across 910 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 Aston Martin Dbx?: The item recorded most often is "A tyre seriously damaged", which appears in 44.4% of failed Aston Martin Dbx 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 Aston Martin Dbx?: The most common advisory is "A tyre seriously damaged", noted on 11.6% of all Aston Martin Dbx tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Aston Martin Dbx usually have at its MOT?: The average odometer reading recorded at test is 24,724 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.

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.