2018 MG MG3 MOT pass rate, common failures & what to check
In 2025, 72.1% of MG MG3s first used in 2018 passed their MOT first time, against 80.9% for all cars first used in 2018. Across 7,706 MG3 first tests from 2023 to 2025, the most common failure areas were tyres, brakes and lamps and electrical equipment.
This page analyses first MOT tests for MG MG3s first used in 2018 (all trims grouped): 2021 to 2025 for the pass-rate trend, and 2023 to 2025 for the failure and advisory analysis — plus what is worth checking before you buy one.
Data: DVSA anonymised MOT tests to December 2025 · Calculated by SortedCars · Updated October 2026
How the 2018 MG MG3 MOT pass rate has changed
Share of first tests passed in each year, MG3s first used in 2018 against all cars first used in 2018 (any make or fuel; not adjusted for mileage, fuel or use). In 2025 the MG3 figure was 8.8 points lower.
View this chart as a table
| Test year | 2018 MG3 | All cars first used 2018 | MG3 first tests |
|---|---|---|---|
| 2021 | 83.3% | 87.6% | 2,552 |
| 2022 | 82.0% | 86.3% | 2,559 |
| 2023 | 78.5% | 84.2% | 2,572 |
| 2024 | 76.4% | 82.5% | 2,588 |
| 2025 | 72.1% | 80.9% | 2,546 |
Common 2018 MG MG3 MOT failures
Share of the 1,877 failed first tests (2023–2025) with at least one failure in each area. A test can fail in more than one area, so the shares add up to more than 100%.
Most common failure items
| DVSA failure item | Share of failed first tests | Tests |
|---|---|---|
| Wipers: does not clear the windscreen effectively | 11.3% | 212 |
| Coil spring: fractured or broken | 9.7% | 182 |
| Headlamp aim: too low | 9.4% | 177 |
| Tread depth: below requirements of 1.6mm | 9.2% | 172 |
| Parking brake efficiency (sp): efficiency below requirements | 8.4% | 157 |
Item names are DVSA’s own wording. 2023–2025 combined.
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Typical repair costs for common MOT failures
Typical UK garage prices for the job, not for an MG3 in particular, and not a quote.
| Failure item | Typical job | Typical UK price | Usual range |
|---|---|---|---|
| Coil spring: fractured or broken | Coil spring replacement | £248 | £175–£400 |
From published UK repair-cost guides, checked September 2026. Only jobs with a published typical price are shown.
What to check on a 2018 MG MG3 before buying
The three areas where failed first tests most often had a fault, 2023–2025.
- Tyres. Worth checking the tread depth across the whole width of each tyre, and the sidewalls for cuts, cracks and bulges.
- Brakes. Worth looking at the discs and pads through the wheel spokes for scoring and a worn lip, and noticing on the test drive whether the car pulls to one side or the pedal feels long.
- Lamps and electrics. Ask someone to watch while you work the brake lights, indicators, sidelights, dipped and main beam, and the number-plate lamps.
Common 2018 MG MG3 MOT advisories
Advisories are points the tester noted that did not fail the car. Most common on 2018 MG3s, as a share of all 7,706 first tests, 2023–2025.
| DVSA advisory item | Share of first tests | Tests |
|---|---|---|
| Tread depth: worn close to legal limit/worn on edge | 18.0% | 1,389 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 10.7% | 825 |
| Tyre condition: slightly damaged/cracking or perishing | 7.8% | 599 |
| Brake pads: wearing thin | 7.2% | 552 |
| Suspension arm: corroded but not seriously weakened | 4.1% | 316 |
Questions about the 2018 MG MG3 MOT
What is the MOT pass rate of a 2018 MG MG3?
In 2025, 72.1% of MG3s first used in 2018 passed their MOT first time, against 80.9% for all cars first used in 2018. A car fixed during the test counts as a fail.
What does a 2018 MG3 most often fail its MOT on?
Tyres (in 31.0% of failed first tests, 2023–2025), brakes (27.8%) and lamps and electrical equipment (27.3%). The single most common item was “Wipers: does not clear the windscreen effectively” (11.3%).
How often does a 2018 MG MG3 fail its MOT?
In 2025, 27.9% of first tests on MG3s first used in 2018 did not pass first time: 22.0% failed, and a further 5.9% had a fault fixed during the test (counted as a fail here). Across 2023–2025, 1,877 of 7,706 first tests did not pass first time.
What are the most common 2018 MG MG3 MOT advisories?
“Tread depth: worn close to legal limit/worn on edge” (on 18.0% of first tests, 2023–2025), “Brake discs: worn, pitted or scored, but not seriously weakened” (10.7%), “Tyre condition: slightly damaged/cracking or perishing” (7.8%), “Brake pads: wearing thin” (7.2%) and “Suspension arm: corroded but not seriously weakened” (4.1%).
Is a 2018 MG MG3 reliable?
An MOT pass rate shows what failed at the test, not how reliable a car is. For this group of cars the first-time pass rate went from 83.3% in 2021 to 72.1% in 2025. For one particular car, its own MOT history matters more than the average.
Other cars first used in 2018
The most-tested cars from the same year. Each page uses the same method.
2018 Ford Fiesta MOT statistics · 2018 Volkswagen Golf MOT statistics · 2018 Vauxhall Corsa MOT statistics · 2018 Ford Focus MOT statistics · 2018 Nissan Qashqai MOT statistics
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