Lexus Gs430 MOT pass rate & common failures
Across 13 model years and 2,075 tests, the Lexus Gs430 passes its MOT 82.5% of the time. All cars of a similar age fail 27.4% of the time, so this is 10.0pp better than the group it competes with. Its most common failure areas are brakes, lighting & signalling and emissions & environmental.
What the MOT record shows
No single area dominates — brakes (8.6%) and lighting & signalling (8.3%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, catalyst emissions and headlamp — headlamp aim alone was recorded 108 times.
Mileage is the strongest signal on the record: 10.5% of 30-60k cars fail, rising to 18.9% once past 150k.
Suspension is the most common advisory, noted on 27.3% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 19.3% in 2021 to 15.0% in 2025, as the worst-kept examples leave the fleet.
How it compares
By model year
Every Gs430 model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2000 | 87 | 75.9% | 24.1% | Brakes |
| 2001 | 383 | 85.1% | 14.9% | Lighting & signalling |
| 2002 | 246 | 80.9% | 19.1% | Brakes |
| 2003 | 375 | 80.5% | 19.5% | Brakes |
| 2004 | 100 | 79.0% | 21.0% | Tyres |
| 2005 | 751 | 83.0% | 17.0% | Brakes |
| 2006 | 87 | 87.4% | 12.6% | Brakes |
| 2007 | 34 | 94.1% | 5.9% | Tyres |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 8.6% | 178 |
| 2 | Lighting & signalling | 8.3% | 172 |
| 3 | Emissions & environmental | 6.1% | 127 |
| 4 | Suspension | 5.9% | 122 |
| 5 | Tyres | 4.8% | 100 |
| 6 | Body, structure & corrosion | 3.4% | 70 |
| 7 | Visibility | 2.9% | 60 |
| 8 | Steering | 0.8% | 16 |
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 | 108 |
| 2 | Catalyst emissions | 77 |
| 3 | Headlamp | 73 |
| 4 | Malfunction indicator lamp | 68 |
| 5 | Tread depth | 61 |
| 6 | Position lamp | 57 |
| 7 | Rbt (sp) | 51 |
| 8 | Exhaust system | 50 |
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 | 27.3% | 566 |
| 2 | Tyres | 20.4% | 424 |
| 3 | Brakes | 20.1% | 418 |
| 4 | Body, structure & corrosion | 11.6% | 241 |
| 5 | Lighting & signalling | 10.3% | 214 |
| 6 | Other defects | 7.2% | 149 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 162 | 10.5% |
| 60-90k | 414 | 16.2% |
| 90-120k | 594 | 18.0% |
| 120-150k | 458 | 19.2% |
| 150k+ | 429 | 18.9% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 492 | 19.3% |
| 2022 | 478 | 19.0% |
| 2023 | 408 | 16.7% |
| 2024 | 363 | 16.0% |
| 2025 | 334 | 15.0% |
What to check before buying a Lexus Gs430
- Brakes (8.6% 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.
- Lighting & signalling (8.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (6.1% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 Gs430?
82.5% of the 2,075 Lexus Gs430 MOT tests in this dataset passed, a 17.4% fail rate, across model years 1997–2009.
What does the Lexus Gs430 most often fail its MOT on?
Brakes, recorded in 8.6% of tests, then lighting & signalling (8.3%).
How much does mileage affect Gs430 MOT results?
Fail rates run at 10.5% for cars in the 30-60k band and 18.9% for 150k+, a 8.4-point difference.
Methodology & source. Based on 2,075 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.