2021 Peugeot Expert Professional L1 — MOT failures & pass rate
Across 3,501 MOT tests analysed for the 2021 Peugeot Expert Professional L1, the most common recorded failure areas were lighting & signalling, visibility and brakes. Its pass rate of 87.4% was below the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 18.7% in the 120-150k group versus 7.3% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.6% | 335 |
| 2 | Visibility | 6.5% | 229 |
| 3 | Brakes | 3.6% | 127 |
| 4 | Tyres | 3.0% | 106 |
| 5 | Emissions & environmental | 1.2% | 42 |
| 6 | Body, structure & corrosion | 0.9% | 33 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 219 |
| 2 | Headlamp aim | 142 |
| 3 | Headlamp | 140 |
| 4 | Brake pads | 132 |
| 5 | Stop lamp | 73 |
| 6 | Tread depth | 66 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 19.0% | 665 |
| 2 | Tyres | 16.1% | 563 |
| 3 | Visibility | 6.8% | 237 |
| 4 | Emissions & environmental | 6.5% | 228 |
| 5 | Other defects | 5.5% | 192 |
| 6 | Lighting & signalling | 4.3% | 152 |
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 | 520 | 7.3% |
| 30-60k | 1,531 | 13.1% |
| 60-90k | 984 | 13.5% |
| 90-120k | 347 | 14.4% |
| 120-150k | 91 | 18.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 38 | 7.9% |
| 2024 | 1,701 | 11.3% |
| 2025 | 1,761 | 14.0% |
What to check before buying a 2021 Expert Professional L1
Before buying a 2021 Peugeot Expert Professional L1, focus on the areas it most often fails on. Lighting & signalling accounted for 9.6% of tests for this year.
- Lighting & signalling (9.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (6.5% 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.
- Brakes (3.6% 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 2021 Peugeot Expert Professional L1s pass their MOT?
87.4% of the 3,501 2021 Peugeot Expert Professional L1 MOT tests in this dataset passed — a 12.6% fail rate.
What is the most common MOT failure on a 2021 Peugeot Expert Professional L1?
Lighting & signalling, recorded in 9.6% of tests, followed by visibility (6.5%).
Does the 2021 Expert Professional L1 get worse with mileage?
Its MOT fail rate rises from 7.3% in the 0-30k band to 18.7% in the 120-150k band.
Methodology & source. Based on 3,501 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.