2017 Dacia Logan — MOT failures & pass rate
13,505 MOT tests on the 2017 Dacia Logan are in this dataset, and 85.0% of them passed. That is 3.1 percentage points worse than small family cars of a similar age, which fail at 11.9%. Failures cluster in lighting & signalling, visibility and tyres.
What the MOT record shows
Lighting & signalling dominates the failure mix at 10.8% of all tests — 5.0 points clear of visibility, so it is the first thing to check.
At component level the recurring items are headlamp aim, wipers and washers — headlamp aim alone was recorded 1,066 times.
Condition tracks the odometer closely. Failures run at 7.5% in the 0-30k band and 25.0% in the 150k+ band, a 17.5-point spread — more than double.
Fuel type barely separates them — petrol fails 14.2% of the time against 15.6% for diesel.
Advisories point at the next bill rather than this one: tyres was flagged on 24.1% of tests without failing them.
The trend is worsening — 11.2% of tests failed in 2021 against 18.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 10.8% | 1,457 |
| 2 | Visibility | 5.8% | 782 |
| 3 | Tyres | 4.3% | 582 |
| 4 | Suspension | 3.5% | 467 |
| 5 | Brakes | 3.3% | 439 |
| 6 | Emissions & environmental | 2.1% | 283 |
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 | 1,066 |
| 2 | Wipers | 509 |
| 3 | Washers | 397 |
| 4 | Headlamp | 358 |
| 5 | Tread depth | 347 |
| 6 | Stop lamp | 221 |
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 | 24.1% | 3,250 |
| 2 | Brakes | 12.4% | 1,678 |
| 3 | Other defects | 7.1% | 955 |
| 4 | Lighting & signalling | 4.0% | 536 |
| 5 | Suspension | 3.6% | 488 |
| 6 | Visibility | 3.5% | 466 |
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 | 2,658 | 7.5% |
| 30-60k | 5,367 | 13.2% |
| 60-90k | 3,015 | 19.1% |
| 90-120k | 1,217 | 20.3% |
| 120-150k | 535 | 20.9% |
| 150k+ | 712 | 25.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 7,799 | 15.6% |
| Petrol | 5,700 | 14.2% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 2,642 | 11.2% |
| 2022 | 2,685 | 13.1% |
| 2023 | 2,727 | 15.6% |
| 2024 | 2,739 | 16.8% |
| 2025 | 2,712 | 18.1% |
What to check before buying a 2017 Logan
On a 2017 Logan, lighting & signalling is what the MOT record says goes wrong most — it appeared in 10.8% of tests. Check these areas before you commit.
- Lighting & signalling (10.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (5.8% 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.
- Tyres (4.3% 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 2017 Dacia Logans pass their MOT?
85.0% of the 13,505 2017 Dacia Logan MOT tests in this dataset passed — a 15.0% fail rate.
What is the most common MOT failure on a 2017 Dacia Logan?
Lighting & signalling, recorded in 10.8% of tests, followed by visibility (5.8%).
Does the 2017 Logan get worse with mileage?
Its MOT fail rate rises from 7.5% in the 0-30k band to 25.0% in the 150k+ band.
Methodology & source. Based on 13,505 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.