2021 Renault Master Lm35 Business + — MOT failures & pass rate
1,161 MOT tests on the 2021 Renault Master Lm35 Business + are in this dataset, and 88.9% of them passed. Against all cars of a similar age (7.5% fail rate), the 2021 Master Lm35 Business + comes out 3.6pp worse. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 9.7% of all tests — 6.6 points clear of brakes, so it is the first thing to check.
At component level the recurring items are headlamp aim, wipers and ball joint — headlamp aim alone was recorded 92 times.
Condition tracks the odometer closely. Failures run at 6.3% in the 0-30k band and 22.5% in the 120-150k band, a 16.2-point spread — more than double.
Advisories point at the next bill rather than this one: brakes was flagged on 12.8% of tests without failing them.
The trend is worsening — 5.4% of tests failed in 2022 against 14.6% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.7% | 112 |
| 2 | Brakes | 3.1% | 36 |
| 3 | Suspension | 2.6% | 30 |
| 4 | Emissions & environmental | 2.1% | 25 |
| 5 | Visibility | 2.1% | 24 |
| 6 | Tyres | 1.5% | 17 |
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 | 92 |
| 2 | Wipers | 25 |
| 3 | Ball joint | 25 |
| 4 | Malfunction indicator lamp | 24 |
| 5 | Outline marker lamp | 23 |
| 6 | Brake pads | 21 |
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 | 12.8% | 148 |
| 2 | Tyres | 12.2% | 142 |
| 3 | Lighting & signalling | 4.0% | 46 |
| 4 | Visibility | 3.7% | 43 |
| 5 | Other defects | 3.0% | 35 |
| 6 | Suspension | 2.7% | 31 |
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 | 363 | 6.3% |
| 30-60k | 334 | 6.9% |
| 60-90k | 262 | 13.4% |
| 90-120k | 144 | 22.9% |
| 120-150k | 40 | 22.5% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2022 | 222 | 5.4% |
| 2023 | 255 | 10.2% |
| 2024 | 332 | 12.0% |
| 2025 | 350 | 14.6% |
What to check before buying a 2021 Master Lm35 Business +
On a 2021 Master Lm35 Business +, lighting & signalling is what the MOT record says goes wrong most — it appeared in 9.7% of tests. Check these areas before you commit.
- Lighting & signalling (9.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (3.1% 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.
- Suspension (2.6% 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.
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 Master Lm35 Business +s pass their MOT?
88.9% of the 1,161 2021 Renault Master Lm35 Business + MOT tests in this dataset passed — a 11.1% fail rate.
What is the most common MOT failure on a 2021 Renault Master Lm35 Business +?
Lighting & signalling, recorded in 9.7% of tests, followed by brakes (3.1%).
Does the 2021 Master Lm35 Business + get worse with mileage?
Its MOT fail rate rises from 6.3% in the 0-30k band to 22.5% in the 120-150k band.
Methodology & source. Based on 1,161 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.