2003 Lexus Ls430 — MOT failures & pass rate
The 2003 Lexus Ls430 passed 83.8% of its 1,013 recorded MOT tests. Against all cars of a similar age (27.6% fail rate), the 2003 Ls430 comes out 11.4pp better. Failures cluster in lighting & signalling, brakes and emissions & environmental.
What the MOT record shows
No single area dominates — lighting & signalling (9.1%) and brakes (7.2%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are position lamp, malfunction indicator lamp and headlamp aim — position lamp alone was recorded 51 times.
Mileage matters less than usual here: the 2003 Ls430 fails 17.0% of the time in the 30-60k band and 19.6% at 150k+, a spread of only 2.6 points.
Suspension is the most common advisory, noted on 28.0% of tests — work that passed today but is likely due soon.
The trend is worsening — 16.0% of tests failed in 2021 against 18.6% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.1% | 92 |
| 2 | Brakes | 7.2% | 73 |
| 3 | Emissions & environmental | 6.9% | 70 |
| 4 | Suspension | 4.8% | 49 |
| 5 | Tyres | 3.3% | 33 |
| 6 | Visibility | 3.3% | 33 |
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 | 51 |
| 2 | Malfunction indicator lamp | 48 |
| 3 | Headlamp aim | 36 |
| 4 | Rbt (sp) | 36 |
| 5 | Catalyst emissions | 28 |
| 6 | Headlamp | 27 |
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 | 28.0% | 284 |
| 2 | Tyres | 21.4% | 217 |
| 3 | Brakes | 18.9% | 192 |
| 4 | Emissions & environmental | 13.4% | 136 |
| 5 | Lighting & signalling | 11.8% | 119 |
| 6 | Body, structure & corrosion | 11.3% | 115 |
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 | 53 | 17.0% |
| 60-90k | 167 | 10.2% |
| 90-120k | 239 | 15.1% |
| 120-150k | 226 | 16.8% |
| 150k+ | 326 | 19.6% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 244 | 16.0% |
| 2022 | 216 | 14.8% |
| 2023 | 203 | 16.8% |
| 2024 | 173 | 15.0% |
| 2025 | 177 | 18.6% |
What to check before buying a 2003 Ls430
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 9.1% of tests. Start there.
- Lighting & signalling (9.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (7.2% 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.
- Emissions & environmental (6.9% 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
How many 2003 Lexus Ls430s pass their MOT?
83.8% of the 1,013 2003 Lexus Ls430 MOT tests in this dataset passed — a 16.2% fail rate.
What is the most common MOT failure on a 2003 Lexus Ls430?
Lighting & signalling, recorded in 9.1% of tests, followed by brakes (7.2%).
Does the 2003 Ls430 get worse with mileage?
Its MOT fail rate rises from 17.0% in the 30-60k band to 19.6% in the 150k+ band.
Methodology & source. Based on 1,013 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.