How reliable is the MG GS compared with other cars?

We do not publish a comparison for the MG GS, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 73.1% across 2,849 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 MG GS?

The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 17.4% of failed MG GS 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 MG GS?

The most common advisory is "A tyre seriously damaged", noted on 28.7% of all MG GS tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a MG GS usually have at its MOT?

The average odometer reading recorded at test is 54,877 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

MG GS MOT pass rate & common failures

From 2,849 recorded MOT tests of the MG GS, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 2,849 MOT tests, 73.1% of MG GS tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the MG GS 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 tread depth not in accordance with the requirements, which appears in 17.4% of failed tests. Cars of this model average 54,877 miles on the odometer when tested.

At a glance

Recorded pass rate

73.1%unadjusted, not comparable2,849 tests

We are not publishing a ranking for the GS. 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 2,849 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

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

1.Tyre tread depth not in accordance with the requirements17.4%
105 occurrencesTyre worn close to the legal limit explained
2.A brake lining or pad worn below 1.5mm16.0%
97 occurrencesBrake drum or shoe worn or contaminated explained
3.Warning device shows system malfunction13.6%
82 occurrencesBrake system warning lamp on, or not working explained
4.The aim of a headlamp is not within limits laid down in the requirements13.4%
81 occurrencesHeadlamp aim incorrect explained
5.An SRS malfunction indicator lamp (MIL) indicates a system malfunction11.2%
68 occurrencesAirbag warning lamp on, or airbag missing explained
6.A tyre pressure monitoring system malfunctioning or obviously inoperative10.6%
64 occurrencesTyre pressure monitoring system inoperative explained
7.A spring or spring component fractured or seriously weakened10.1%
61 occurrencesRoad spring broken or fractured explained
8.ESC MIL indicates a system malfunction9.6%
58 occurrences
9.Wiper blade missing or obviously not clearing the windscreen8.8%
53 occurrencesWiper or washer not working properly explained
10.Exhaust system leaking or insecure5.9%
36 occurrencesExhaust leaking or insecure explained

Warnings without a failure

Most common advisories

Share of all MG GS 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 damaged28.7%
819 testsTyre damaged or deteriorated explained
2.Brake disc or drum excessively weakened, insecure or fractured23.9%
680 testsBrake disc worn, pitted or scored explained
3.Tyre tread depth not in accordance with the requirements22.1%
630 testsTyre worn close to the legal limit explained
4.A brake lining or pad worn below 1.5mm11.4%
324 testsBrake drum or shoe worn or contaminated explained
5.A spring or spring component fractured or seriously weakened6.4%
181 testsRoad spring broken or fractured explained
6.Child Seat fitted not allowing full inspection of adult belt4.2%
119 tests
7.A suspension component excessively damaged or corroded4.1%
116 testsSuspension mounting corroded or insecure explained
8.A suspension component excessively damaged or corroded3.9%
111 testsSuspension mounting corroded or insecure explained

What gets tested

The GS fleet

Average mileage recorded at test: 54,877
Fuel mix of tested cars: Petrol100.0%

Check a specific MG GS

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

Compare within the range

Other MG models

MG ZS — 82.1% unadjusted
MG HS — 88.3% unadjusted
MG 3 — 75.1% unadjusted
MG 5 — 84.3% unadjusted
MG TF — 69.6% unadjusted
MG Mgf — 66.9% unadjusted
All MG models

Common questions

How reliable is the MG GS compared with other cars?: We do not publish a comparison for the MG GS, 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 73.1% across 2,849 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 MG GS?: The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 17.4% of failed MG GS 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 MG GS?: The most common advisory is "A tyre seriously damaged", noted on 28.7% of all MG GS tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a MG GS usually have at its MOT?: The average odometer reading recorded at test is 54,877 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.