Lexus Rx 400H Sr MOT pass rate & common failures
The Lexus Rx 400H Sr appears in 466 MOT tests spanning model years 2007–2016, and 83.7% of them passed. Against all cars of a similar age (26.5% fail rate), the Rx 400H Sr comes out 10.2pp better. Its most common failure areas are lighting & signalling, brakes and suspension.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 10.3% of tests against 7.1% for the next-worst category.
At component level the recurring items are position lamp, headlamp aim and pins and bushes — position lamp alone was recorded 30 times.
Mileage is the strongest signal on the record: 6.5% of 60-90k cars fail, rising to 20.7% once past 150k — 3.2× the risk.
Suspension is the most common advisory, noted on 44.6% of tests — work that passed today but is likely due soon.
The trend is worsening — 13.0% of tests failed in 2021 against 17.1% in 2025, the usual pattern as a fleet ages.
How it compares
By model year
Every Rx 400H Sr model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2007 | 250 | 81.2% | 18.8% | Lighting & signalling |
| 2008 | 184 | 86.4% | 13.6% | Lighting & signalling |
| 2009 | 31 | 87.1% | 12.9% | Suspension |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 10.3% | 48 |
| 2 | Brakes | 7.1% | 33 |
| 3 | Suspension | 6.9% | 32 |
| 4 | Tyres | 3.0% | 14 |
| 5 | Visibility | 3.0% | 14 |
| 6 | Body, structure & corrosion | 2.8% | 13 |
| 7 | Emissions & environmental | 2.1% | 10 |
| 8 | Other defects | 1.7% | 8 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Position lamp | 30 |
| 2 | Headlamp aim | 19 |
| 3 | Pins and bushes | 13 |
| 4 | Rbt (sp) | 13 |
| 5 | Registration plate lamp(s) | 12 |
| 6 | Service brake performance | 12 |
| 7 | Tread depth | 9 |
| 8 | Wipers | 9 |
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 | 44.6% | 208 |
| 2 | Tyres | 24.3% | 113 |
| 3 | Brakes | 22.5% | 105 |
| 4 | Body, structure & corrosion | 15.2% | 71 |
| 5 | Lighting & signalling | 14.6% | 68 |
| 6 | Other defects | 14.0% | 65 |
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 | 31 | 6.5% |
| 90-120k | 77 | 9.1% |
| 120-150k | 153 | 15.7% |
| 150k+ | 198 | 20.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 100 | 13.0% |
| 2022 | 99 | 16.2% |
| 2023 | 96 | 15.6% |
| 2024 | 95 | 20.0% |
| 2025 | 76 | 17.1% |
What to check before buying a Lexus Rx 400H Sr
- Lighting & signalling (10.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- 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.
- Suspension (6.9% 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 Lexus Rx 400H Sr?
83.7% of the 466 Lexus Rx 400H Sr MOT tests in this dataset passed, a 16.3% fail rate, across model years 2007–2016.
What does the Lexus Rx 400H Sr most often fail its MOT on?
Lighting & signalling, recorded in 10.3% of tests, then brakes (7.1%).
How much does mileage affect Rx 400H Sr MOT results?
Fail rates run at 6.5% for cars in the 60-90k band and 20.7% for 150k+, a 14.3-point difference.
Methodology & source. Based on 466 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.