2003 Lexus Ls430 — MOT failures & pass rate
Across 988 MOT tests analysed for the 2003 Lexus Ls430, the most common recorded failure areas were lighting & signalling, emissions & environmental and brakes. Its pass rate of 84.0% was above the average for cars of a similar age (74.3%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.2% | 91 |
| 2 | Emissions & environmental | 7.1% | 70 |
| 3 | Brakes | 6.8% | 67 |
| 4 | Suspension | 5.0% | 49 |
| 5 | Visibility | 3.3% | 33 |
| 6 | Tyres | 3.1% | 31 |
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) | 31 |
| 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 | 28.7% | 284 |
| 2 | Tyres | 21.4% | 211 |
| 3 | Brakes | 19.4% | 192 |
| 4 | Emissions & environmental | 13.5% | 133 |
| 5 | Lighting & signalling | 12.0% | 119 |
| 6 | Body, structure & corrosion | 11.4% | 113 |
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 | 236 | 14.8% |
| 120-150k | 209 | 15.8% |
| 150k+ | 321 | 19.9% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 240 | 15.8% |
| 2022 | 211 | 14.7% |
| 2023 | 197 | 16.2% |
| 2024 | 169 | 15.4% |
| 2025 | 171 | 18.1% |
What to check before buying a 2003 Ls430
Before buying a 2003 Lexus Ls430, focus on the areas it most often fails on. Lighting & signalling accounted for 9.2% of tests for this year.
- Lighting & signalling (9.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (7.1% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
- Brakes (6.8% 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.
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?
84.0% of the 988 2003 Lexus Ls430 MOT tests in this dataset passed — a 16.0% fail rate.
What is the most common MOT failure on a 2003 Lexus Ls430?
Lighting & signalling, recorded in 9.2% of tests, followed by emissions & environmental (7.1%).
Does the 2003 Ls430 get worse with mileage?
Its MOT fail rate rises from 17.0% in the 30-60k band to 19.9% in the 150k+ band.
Methodology & source. Based on 988 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.