1990 Mercedes-Benz 190 — MOT failures & pass rate
The 1990 Mercedes-Benz 190 passed 78.7% of its 555 recorded MOT tests. All cars of a similar age fail at 21.8%, so the 1990 190 sits squarely on the average. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (11.2%) and suspension (9.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, component mounting prescribed areas and non catalyst emissions — headlamp aim alone was recorded 36 times.
Mileage matters less than usual here: the 1990 190 fails 20.0% of the time in the 60-90k band and 21.9% at 150k+, a spread of only 1.9 points.
Advisories point at the next bill rather than this one: suspension was flagged on 30.6% of tests without failing them.
The trend is improving — the fail rate fell from 24.0% in 2021 to 19.4% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.2% | 62 |
| 2 | Suspension | 9.0% | 50 |
| 3 | Brakes | 7.0% | 39 |
| 4 | Body, structure & corrosion | 6.1% | 34 |
| 5 | Emissions & environmental | 5.6% | 31 |
| 6 | Visibility | 2.7% | 15 |
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 | 36 |
| 2 | Component mounting prescribed areas | 35 |
| 3 | Non catalyst emissions | 27 |
| 4 | Position lamp | 20 |
| 5 | Ball joint dust cover | 18 |
| 6 | Service brake performance | 16 |
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 | 30.6% | 170 |
| 2 | Brakes | 28.5% | 158 |
| 3 | Body, structure & corrosion | 15.3% | 85 |
| 4 | Tyres | 14.9% | 83 |
| 5 | Emissions & environmental | 13.2% | 73 |
| 6 | Other defects | 11.0% | 61 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 60-90k | 85 | 20.0% |
| 90-120k | 117 | 21.4% |
| 120-150k | 128 | 22.7% |
| 150k+ | 192 | 21.9% |
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 379 | 19.8% |
| Diesel | 176 | 24.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 129 | 24.0% |
| 2022 | 110 | 21.8% |
| 2023 | 109 | 18.4% |
| 2024 | 104 | 22.1% |
| 2025 | 103 | 19.4% |
What to check before buying a 1990 190
On a 1990 190, lighting & signalling is what the MOT record says goes wrong most — it appeared in 11.2% of tests. Check these areas before you commit.
- Lighting & signalling (11.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (9.0% 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.
- Brakes (7.0% 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 1990 Mercedes-Benz 190s pass their MOT?
78.7% of the 555 1990 Mercedes-Benz 190 MOT tests in this dataset passed — a 21.3% fail rate.
What is the most common MOT failure on a 1990 Mercedes-Benz 190?
Lighting & signalling, recorded in 11.2% of tests, followed by suspension (9.0%).
Does the 1990 190 get worse with mileage?
Its MOT fail rate rises from 20.0% in the 60-90k band to 21.9% in the 150k+ band.
Methodology & source. Based on 555 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.