2014 Dacia Logan — MOT failures & pass rate
Across 13,278 MOT tests, the 2014 Dacia Logan recorded a 78.7% pass rate. Against small family cars of a similar age (17.4% fail rate), the 2014 Logan comes out 3.9pp worse. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 12.9% of tests against 8.2% for the next-worst category.
At component level the recurring items are headlamp aim, tread depth and ball joint — headlamp aim alone was recorded 905 times.
A 150k+ example is materially riskier than a 0-30k one: 25.8% versus 7.9%.
Fuel type barely separates them — petrol fails 21.1% of the time against 21.4% for diesel.
Tyres is the most common advisory, noted on 27.2% of tests — work that passed today but is likely due soon.
The trend is worsening — 17.2% of tests failed in 2021 against 23.7% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.9% | 1,716 |
| 2 | Suspension | 8.2% | 1,089 |
| 3 | Brakes | 5.7% | 760 |
| 4 | Visibility | 5.3% | 707 |
| 5 | Tyres | 5.0% | 659 |
| 6 | Body, structure & corrosion | 1.7% | 228 |
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 | 905 |
| 2 | Tread depth | 498 |
| 3 | Ball joint | 484 |
| 4 | Horn | 480 |
| 5 | Washers | 445 |
| 6 | Wipers | 351 |
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 | 27.2% | 3,610 |
| 2 | Brakes | 19.6% | 2,605 |
| 3 | Suspension | 14.0% | 1,852 |
| 4 | Lighting & signalling | 6.5% | 866 |
| 5 | Other defects | 6.3% | 838 |
| 6 | Visibility | 4.6% | 607 |
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 | 592 | 7.9% |
| 30-60k | 3,212 | 15.6% |
| 60-90k | 4,278 | 22.8% |
| 90-120k | 2,663 | 25.1% |
| 120-150k | 1,227 | 24.2% |
| 150k+ | 1,304 | 25.8% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 8,245 | 21.4% |
| Petrol | 5,030 | 21.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 2,698 | 17.2% |
| 2022 | 2,771 | 20.6% |
| 2023 | 2,711 | 22.2% |
| 2024 | 2,625 | 23.1% |
| 2025 | 2,473 | 23.7% |
What to check before buying a 2014 Logan
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 12.9% of tests. Start there.
- Lighting & signalling (12.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (8.2% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Brakes (5.7% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
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 2014 Dacia Logans pass their MOT?
78.7% of the 13,278 2014 Dacia Logan MOT tests in this dataset passed — a 21.3% fail rate.
What is the most common MOT failure on a 2014 Dacia Logan?
Lighting & signalling, recorded in 12.9% of tests, followed by suspension (8.2%).
Does the 2014 Logan get worse with mileage?
Its MOT fail rate rises from 7.9% in the 0-30k band to 25.8% in the 150k+ band.
Methodology & source. Based on 13,278 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.