2020 Bmw M340D Mhev Auto — MOT failures & pass rate
Across 875 MOT tests analysed for the 2020 Bmw M340D Mhev Auto, the most common recorded failure areas were tyres, lighting & signalling and emissions & environmental. Its pass rate of 89.8% was in line with the average for cars of a similar age (90.6%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 7.5% | 66 |
| 2 | Lighting & signalling | 1.3% | 11 |
| 3 | Emissions & environmental | 1.0% | 9 |
| 4 | Other defects | 0.6% | 5 |
| 5 | Visibility | 0.6% | 5 |
| 6 | Suspension | 0.5% | 4 |
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 | 17 |
| 2 | Malfunction indicator lamp | 9 |
| 3 | Headlamp aim | 7 |
| 4 | Registration plates | 7 |
| 5 | Side repeaters | 4 |
| 6 | Ball joint | 3 |
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 | 11.8% | 103 |
| 2 | Other defects | 3.4% | 30 |
| 3 | Brakes | 2.9% | 25 |
| 4 | Visibility | 2.4% | 21 |
| 5 | Suspension | 1.0% | 9 |
| 6 | Seat belts & restraints | 0.5% | 4 |
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 | 316 | 8.5% |
| 30-60k | 460 | 12.0% |
| 60-90k | 94 | 7.4% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 312 | 13.1% |
| 2024 | 285 | 10.2% |
| 2025 | 275 | 6.9% |
What to check before buying a 2020 M340D Mhev Auto
Before buying a 2020 Bmw M340D Mhev Auto, focus on the areas it most often fails on. Tyres accounted for 7.5% of tests for this year.
- Tyres (7.5% 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.
- 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.
- Emissions & environmental (1.0% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 2020 Bmw M340D Mhev Autos pass their MOT?
89.8% of the 875 2020 Bmw M340D Mhev Auto MOT tests in this dataset passed — a 10.2% fail rate.
What is the most common MOT failure on a 2020 Bmw M340D Mhev Auto?
Tyres, recorded in 7.5% of tests, followed by lighting & signalling (1.3%).
Does the 2020 M340D Mhev Auto get worse with mileage?
Its MOT fail rate rises from 8.5% in the 0-30k band to 7.4% in the 60-90k band.
Methodology & source. Based on 875 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.