Renault Trucks Master 100 35 Lwb MOT pass rate & common failures
383 MOT tests on the Renault Trucks Master 100 35 Lwb (2008–2011) give it a 73.6% pass rate. That is 2.2 percentage points worse than all cars of a similar age, which fail at 24.1%. Its most common failure areas are lighting & signalling, brakes and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 18.0% of all tests — 4.2 points clear of brakes, so it is the first thing to check.
At component level the recurring items are headlamp aim, rbt (sp) and ball joint — headlamp aim alone was recorded 27 times.
A 150k+ example is materially riskier than a 60-90k one: 24.7% versus 30.0%.
Advisories point at the next bill rather than this one: suspension was flagged on 23.2% of tests without failing them.
The trend is worsening — 20.2% of tests failed in 2021 against 25.4% in 2025, the usual pattern as a fleet ages.
How it compares
By model year
Every Master 100 35 Lwb model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2010 | 276 | 76.8% | 23.2% | Lighting & signalling |
| 2011 | 68 | 66.2% | 33.8% | Lighting & signalling |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 18.0% | 69 |
| 2 | Brakes | 13.8% | 53 |
| 3 | Suspension | 10.7% | 41 |
| 4 | Body, structure & corrosion | 7.8% | 30 |
| 5 | Visibility | 6.5% | 25 |
| 6 | Seat belts & restraints | 5.7% | 22 |
| 7 | Tyres | 2.9% | 11 |
| 8 | Steering | 2.4% | 9 |
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 | 27 |
| 2 | Rbt (sp) | 26 |
| 3 | Ball joint | 25 |
| 4 | Joints | 25 |
| 5 | Position lamp | 21 |
| 6 | Wipers | 19 |
| 7 | Stop lamp | 19 |
| 8 | Service brake performance | 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 | Suspension | 23.2% | 89 |
| 2 | Brakes | 21.7% | 83 |
| 3 | Tyres | 17.2% | 66 |
| 4 | Emissions & environmental | 16.4% | 63 |
| 5 | Lighting & signalling | 13.8% | 53 |
| 6 | Other defects | 10.4% | 40 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 60-90k | 30 | 30.0% |
| 120-150k | 60 | 23.3% |
| 150k+ | 219 | 24.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 89 | 20.2% |
| 2022 | 89 | 30.3% |
| 2023 | 73 | 27.4% |
| 2024 | 69 | 29.0% |
| 2025 | 63 | 25.4% |
What to check before buying a Renault Trucks Master 100 35 Lwb
- Lighting & signalling (18.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (13.8% 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 (10.7% 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
What is the MOT pass rate for the Renault Trucks Master 100 35 Lwb?
73.6% of the 383 Renault Trucks Master 100 35 Lwb MOT tests in this dataset passed, a 26.4% fail rate, across model years 2008–2011.
What does the Renault Trucks Master 100 35 Lwb most often fail its MOT on?
Lighting & signalling, recorded in 18.0% of tests, then brakes (13.8%).
How much does mileage affect Master 100 35 Lwb MOT results?
Fail rates run at 30.0% for cars in the 60-90k band and 24.7% for 150k+, a 5.3-point difference.
Methodology & source. Based on 383 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.