2020 Dacia Logan — MOT failures & pass rate
The 2020 Dacia Logan passed 89.0% of its 2,085 recorded MOT tests. That is 2.2 percentage points worse than small family cars of a similar age, which fail at 8.8%. Failures cluster in lighting & signalling, visibility and tyres.
What the MOT record shows
No single area dominates — lighting & signalling (8.9%) and visibility (7.1%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, wipers and washers — headlamp aim alone was recorded 138 times.
Mileage is the strongest signal on the record: 7.7% of 0-30k cars fail, rising to 18.8% once past 150k — 2.4× the risk.
Advisories point at the next bill rather than this one: tyres was flagged on 22.0% of tests without failing them.
The trend is worsening — 3.1% of tests failed in 2021 against 10.8% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 8.9% | 186 |
| 2 | Visibility | 7.1% | 148 |
| 3 | Tyres | 3.0% | 63 |
| 4 | Brakes | 2.2% | 46 |
| 5 | Suspension | 1.2% | 25 |
| 6 | Emissions & environmental | 0.9% | 19 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 138 |
| 2 | Wipers | 126 |
| 3 | Washers | 51 |
| 4 | Headlamp | 48 |
| 5 | Tread depth | 36 |
| 6 | Brake pads | 31 |
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 | 22.0% | 459 |
| 2 | Brakes | 11.6% | 241 |
| 3 | Other defects | 6.5% | 136 |
| 4 | Visibility | 3.5% | 72 |
| 5 | Lighting & signalling | 2.2% | 46 |
| 6 | Road wheels | 1.3% | 28 |
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 | 979 | 7.7% |
| 30-60k | 743 | 11.6% |
| 60-90k | 206 | 17.5% |
| 90-120k | 68 | 19.1% |
| 120-150k | 41 | 24.4% |
| 150k+ | 48 | 18.8% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 1,618 | 9.8% |
| Diesel | 467 | 15.0% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 32 | 3.1% |
| 2022 | 76 | 11.8% |
| 2023 | 681 | 10.9% |
| 2024 | 650 | 11.5% |
| 2025 | 646 | 10.8% |
What to check before buying a 2020 Logan
On a 2020 Logan, lighting & signalling is what the MOT record says goes wrong most — it appeared in 8.9% of tests. Check these areas before you commit.
- Lighting & signalling (8.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (7.1% 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.
- Tyres (3.0% 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.
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 Dacia Logans pass their MOT?
89.0% of the 2,085 2020 Dacia Logan MOT tests in this dataset passed — a 11.0% fail rate.
What is the most common MOT failure on a 2020 Dacia Logan?
Lighting & signalling, recorded in 8.9% of tests, followed by visibility (7.1%).
Does the 2020 Logan get worse with mileage?
Its MOT fail rate rises from 7.7% in the 0-30k band to 18.8% in the 150k+ band.
Methodology & source. Based on 2,085 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.