1998 BMW 8 Series — MOT failures & pass rate
The 1998 BMW 8 Series passed 85.7% of its 727 recorded MOT tests. Coupes & convertibles of a similar age fail 21.5% of the time, so this is 7.2pp better than the group it competes with. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
Lighting & signalling dominates the failure mix at 8.8% of all tests — 3.4 points clear of suspension, so it is the first thing to check.
At component level the recurring items are ball joint dust cover, headlamp aim and washers — ball joint dust cover alone was recorded 43 times.
Condition tracks the odometer closely. Failures run at 9.5% in the 30-60k band and 21.8% in the 150k+ band, a 12.3-point spread — more than double.
Advisories point at the next bill rather than this one: suspension was flagged on 25.2% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 8.8% | 64 |
| 2 | Suspension | 5.4% | 39 |
| 3 | Brakes | 5.0% | 36 |
| 4 | Visibility | 4.7% | 34 |
| 5 | Body, structure & corrosion | 2.5% | 18 |
| 6 | Tyres | 1.9% | 14 |
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 dust cover | 43 |
| 2 | Headlamp aim | 40 |
| 3 | Washers | 22 |
| 4 | Pins and bushes | 21 |
| 5 | Wipers | 15 |
| 6 | Individual direction indicators | 15 |
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 | 25.2% | 183 |
| 2 | Brakes | 20.4% | 148 |
| 3 | Emissions & environmental | 16.0% | 116 |
| 4 | Other defects | 13.2% | 96 |
| 5 | Tyres | 10.2% | 74 |
| 6 | Body, structure & corrosion | 6.5% | 47 |
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 | 74 | 9.5% |
| 60-90k | 194 | 12.4% |
| 90-120k | 243 | 16.5% |
| 120-150k | 128 | 12.5% |
| 150k+ | 78 | 21.8% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 147 | 15.0% |
| 2022 | 149 | 12.1% |
| 2023 | 153 | 15.0% |
| 2024 | 135 | 13.3% |
| 2025 | 143 | 16.1% |
What to check before buying a 1998 8 Series
On a 1998 8 Series, lighting & signalling is what the MOT record says goes wrong most — it appeared in 8.8% of tests. Check these areas before you commit.
- Lighting & signalling (8.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (5.4% 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.
- Brakes (5.0% 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 1998 BMW 8 Seriess pass their MOT?
85.7% of the 727 1998 BMW 8 Series MOT tests in this dataset passed — a 14.3% fail rate.
What is the most common MOT failure on a 1998 BMW 8 Series?
Lighting & signalling, recorded in 8.8% of tests, followed by suspension (5.4%).
Does the 1998 8 Series get worse with mileage?
Its MOT fail rate rises from 9.5% in the 30-60k band to 21.8% in the 150k+ band.
Methodology & source. Based on 727 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.