1988 Mercedes-Benz 190 — MOT failures & pass rate
322 MOT tests on the 1988 Mercedes-Benz 190 are in this dataset, and 82.0% of them passed. Against all cars of a similar age (21.0% fail rate), the 1988 190 comes out 2.9pp better. Failures cluster in lighting & signalling, suspension and emissions & environmental.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 11.8% of tests against 7.4% for the next-worst category.
At component level the recurring items are headlamp aim, non catalyst emissions and component mounting prescribed areas — headlamp aim alone was recorded 29 times.
Condition tracks the odometer closely. Failures run at 18.9% in the 30-60k band and 10.5% in the 150k+ band, a 8.4-point spread.
Brakes is the most common advisory, noted on 24.5% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 19.5% in 2021 to 14.9% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.8% | 38 |
| 2 | Suspension | 7.4% | 24 |
| 3 | Emissions & environmental | 6.5% | 21 |
| 4 | Body, structure & corrosion | 6.5% | 21 |
| 5 | Brakes | 5.9% | 19 |
| 6 | Visibility | 2.8% | 9 |
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 | 29 |
| 2 | Non catalyst emissions | 19 |
| 3 | Component mounting prescribed areas | 12 |
| 4 | Exhaust system | 10 |
| 5 | Position lamp | 9 |
| 6 | Ball joint dust cover | 8 |
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 | 24.5% | 79 |
| 2 | Suspension | 19.9% | 64 |
| 3 | Emissions & environmental | 15.2% | 49 |
| 4 | Body, structure & corrosion | 12.4% | 40 |
| 5 | Tyres | 8.1% | 26 |
| 6 | Other defects | 5.3% | 17 |
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 | 37 | 18.9% |
| 60-90k | 75 | 21.3% |
| 90-120k | 50 | 18.0% |
| 120-150k | 98 | 18.4% |
| 150k+ | 57 | 10.5% |
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 244 | 19.7% |
| Diesel | 78 | 12.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 77 | 19.5% |
| 2022 | 82 | 23.2% |
| 2023 | 61 | 13.1% |
| 2024 | 55 | 16.4% |
| 2025 | 47 | 14.9% |
What to check before buying a 1988 190
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 11.8% of tests. Start there.
- Lighting & signalling (11.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (7.4% 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.
- Emissions & environmental (6.5% 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 1988 Mercedes-Benz 190s pass their MOT?
82.0% of the 322 1988 Mercedes-Benz 190 MOT tests in this dataset passed — a 18.0% fail rate.
What is the most common MOT failure on a 1988 Mercedes-Benz 190?
Lighting & signalling, recorded in 11.8% of tests, followed by suspension (7.4%).
Does the 1988 190 get worse with mileage?
Its MOT fail rate rises from 18.9% in the 30-60k band to 10.5% in the 150k+ band.
Methodology & source. Based on 322 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.