2023 MG MG4 — MOT failures & pass rate
2,340 MOT tests on the 2023 MG MG4 are in this dataset, and 94.1% of them passed. All cars of a similar age fail at 5.9%, so the 2023 MG4 sits squarely on the average. Failures cluster in tyres, visibility and lighting & signalling.
What the MOT record shows
Tyres dominates the failure mix at 5.0% of all tests — 3.2 points clear of visibility, so it is the first thing to check.
At component level the recurring items are tread depth, headlamp aim and wipers — tread depth alone was recorded 54 times.
Mileage matters less than usual here: the 2023 MG4 fails 5.2% of the time in the 0-30k band and 6.3% at 60-90k, a spread of only 1.1 points.
Advisories point at the next bill rather than this one: tyres was flagged on 21.4% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.0% | 116 |
| 2 | Visibility | 1.8% | 41 |
| 3 | Lighting & signalling | 1.3% | 30 |
| 4 | Seat belts & restraints | 0.3% | 7 |
| 5 | Suspension | 0.2% | 5 |
| 6 | Body, structure & corrosion | 0.1% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 54 |
| 2 | Headlamp aim | 27 |
| 3 | Wipers | 25 |
| 4 | Washers | 21 |
| 5 | SRS malfunction indicator lamp | 5 |
| 6 | Pins and bushes | 5 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 21.4% | 502 |
| 2 | Other defects | 3.7% | 86 |
| 3 | Visibility | 1.9% | 44 |
| 4 | Brakes | 1.5% | 35 |
| 5 | Suspension | 1.0% | 24 |
| 6 | Lighting & signalling | 0.3% | 8 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 1,307 | 5.2% |
| 30-60k | 852 | 6.8% |
| 60-90k | 159 | 6.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 814 | 5.0% |
| 2025 | 1,507 | 6.4% |
What to check before buying a 2023 MG4
On a 2023 MG4, tyres is what the MOT record says goes wrong most — it appeared in 5.0% of tests. Check these areas before you commit.
- Tyres (5.0% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Visibility (1.8% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Lighting & signalling (1.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2023 MG MG4s pass their MOT?
94.1% of the 2,340 2023 MG MG4 MOT tests in this dataset passed — a 5.9% fail rate.
What is the most common MOT failure on a 2023 MG MG4?
Tyres, recorded in 5.0% of tests, followed by visibility (1.8%).
Does the 2023 MG4 get worse with mileage?
Its MOT fail rate rises from 5.2% in the 0-30k band to 6.3% in the 60-90k band.
Methodology & source. Based on 2,340 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.