2003 Mercedes-Benz E-Class — MOT failures & pass rate
Across 23,401 MOT tests, the 2003 Mercedes-Benz E-Class recorded a 77.3% pass rate. That is 1.7 percentage points better than executive cars of a similar age, which fail at 24.4%. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (12.2%) and lighting & signalling (10.5%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are ball joint, headlamp aim and rigid brake pipes — ball joint alone was recorded 1,847 times.
Mileage matters less than usual here: the 2003 E-Class fails 22.2% of the time in the 0-30k band and 24.4% at 150k+, a spread of only 2.3 points.
Split by fuel, diesel examples fail 3.3pp more often than petrol ones (23.8% vs 20.4%) — worth weighing if you have a choice.
Advisories point at the next bill rather than this one: brakes was flagged on 36.0% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 12.2% | 2,849 |
| 2 | Lighting & signalling | 10.5% | 2,464 |
| 3 | Brakes | 8.5% | 1,998 |
| 4 | Tyres | 5.8% | 1,356 |
| 5 | Emissions & environmental | 3.6% | 840 |
| 6 | Visibility | 3.2% | 739 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Ball joint | 1,847 |
| 2 | Headlamp aim | 1,294 |
| 3 | Rigid brake pipes | 1,171 |
| 4 | Headlamp | 975 |
| 5 | Tread depth | 911 |
| 6 | Ball joint dust cover | 661 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 36.0% | 8,424 |
| 2 | Suspension | 34.4% | 8,046 |
| 3 | Tyres | 26.7% | 6,254 |
| 4 | Lighting & signalling | 15.2% | 3,566 |
| 5 | Other defects | 12.5% | 2,921 |
| 6 | Emissions & environmental | 8.9% | 2,073 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 194 | 22.2% |
| 30-60k | 1,124 | 15.2% |
| 60-90k | 2,792 | 18.8% |
| 90-120k | 5,106 | 22.4% |
| 120-150k | 5,571 | 23.7% |
| 150k+ | 8,397 | 24.4% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 16,167 | 23.8% |
| Petrol | 7,234 | 20.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 6,662 | 23.1% |
| 2022 | 5,661 | 23.0% |
| 2023 | 4,536 | 22.3% |
| 2024 | 3,614 | 22.6% |
| 2025 | 2,928 | 22.3% |
What to check before buying a 2003 E-Class
On a 2003 E-Class, suspension is what the MOT record says goes wrong most — it appeared in 12.2% of tests. Check these areas before you commit.
- Suspension (12.2% 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.
- Lighting & signalling (10.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.5% 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 Mercedes-Benz E-Classs pass their MOT?
77.3% of the 23,401 2003 Mercedes-Benz E-Class MOT tests in this dataset passed — a 22.7% fail rate.
What is the most common MOT failure on a 2003 Mercedes-Benz E-Class?
Suspension, recorded in 12.2% of tests, followed by lighting & signalling (10.5%).
Does the 2003 E-Class get worse with mileage?
Its MOT fail rate rises from 22.2% in the 0-30k band to 24.4% in the 150k+ band.
Methodology & source. Based on 23,401 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.