2021 Renault Trafic Sl30 B-Ness+ — MOT failures & pass rate
Across 1,023 MOT tests, the 2021 Renault Trafic Sl30 B-Ness+ recorded a 78.3% pass rate. All cars of a similar age fail 8.7% of the time, so this is 13.0pp worse than the group it competes with. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (7.7%) and suspension (7.4%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are brake pads, shock absorbers and headlamp aim — brake pads alone was recorded 74 times.
Mileage matters less than usual here: the 2021 Trafic Sl30 B-Ness+ fails 21.0% of the time in the 0-30k band and 23.6% at 90-120k, a spread of only 2.6 points.
Advisories point at the next bill rather than this one: tyres was flagged on 21.0% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 7.7% | 79 |
| 2 | Suspension | 7.4% | 76 |
| 3 | Brakes | 7.1% | 73 |
| 4 | Tyres | 5.2% | 53 |
| 5 | Emissions & environmental | 3.4% | 35 |
| 6 | Visibility | 3.0% | 31 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Brake pads | 74 |
| 2 | Shock absorbers | 53 |
| 3 | Headlamp aim | 33 |
| 4 | Malfunction indicator lamp | 32 |
| 5 | Stop lamp | 22 |
| 6 | Washers | 17 |
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 | 21.0% | 215 |
| 2 | Brakes | 19.8% | 203 |
| 3 | Suspension | 10.1% | 103 |
| 4 | Visibility | 6.0% | 61 |
| 5 | Other defects | 5.8% | 59 |
| 6 | Lighting & signalling | 5.7% | 58 |
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 | 157 | 21.0% |
| 30-60k | 401 | 21.4% |
| 60-90k | 308 | 21.8% |
| 90-120k | 127 | 23.6% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 495 | 23.6% |
| 2025 | 514 | 20.0% |
What to check before buying a 2021 Trafic Sl30 B-Ness+
On a 2021 Trafic Sl30 B-Ness+, lighting & signalling is what the MOT record says goes wrong most — it appeared in 7.7% of tests. Check these areas before you commit.
- Lighting & signalling (7.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (7.4% 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 (7.1% 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 Renault Trafic Sl30 B-Ness+s pass their MOT?
78.3% of the 1,023 2021 Renault Trafic Sl30 B-Ness+ MOT tests in this dataset passed — a 21.7% fail rate.
What is the most common MOT failure on a 2021 Renault Trafic Sl30 B-Ness+?
Lighting & signalling, recorded in 7.7% of tests, followed by suspension (7.4%).
Does the 2021 Trafic Sl30 B-Ness+ get worse with mileage?
Its MOT fail rate rises from 21.0% in the 0-30k band to 23.6% in the 90-120k band.
Methodology & source. Based on 1,023 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.