1998 Land Rover Defender — MOT failures & pass rate
Across 21,447 MOT tests, the 1998 Land Rover Defender recorded a 75.2% pass rate. That is effectively the same as large SUVs of a similar age (24.4% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and body, structure & corrosion.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 16.9% of tests against 10.8% for the next-worst category.
At component level the recurring items are chassis condition, headlamp aim and component mounting prescribed areas — chassis condition alone was recorded 1,197 times.
Condition tracks the odometer closely. Failures run at 18.7% in the 0-30k band and 27.0% in the 150k+ band, a 8.3-point spread.
The petrol cars hold up better: 20.1% fail against 25.1% for diesel, a 5.0-point gap across 21,447 tests.
Suspension is the most common advisory, noted on 30.9% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 26.6% in 2021 to 24.4% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 16.9% | 3,618 |
| 2 | Suspension | 10.8% | 2,318 |
| 3 | Body, structure & corrosion | 9.8% | 2,105 |
| 4 | Steering | 8.1% | 1,744 |
| 5 | Brakes | 7.1% | 1,529 |
| 6 | Visibility | 5.2% | 1,107 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Chassis condition | 1,197 |
| 2 | Headlamp aim | 1,093 |
| 3 | Component mounting prescribed areas | 1,030 |
| 4 | Shock absorbers | 985 |
| 5 | Rear fog lamp | 911 |
| 6 | Track rod end | 865 |
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 | 30.9% | 6,620 |
| 2 | Emissions & environmental | 29.1% | 6,240 |
| 3 | Brakes | 23.6% | 5,062 |
| 4 | Steering | 17.0% | 3,639 |
| 5 | Body, structure & corrosion | 16.5% | 3,538 |
| 6 | Seat belts & restraints | 12.3% | 2,640 |
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 | 825 | 18.7% |
| 30-60k | 1,194 | 18.9% |
| 60-90k | 2,660 | 20.6% |
| 90-120k | 3,942 | 24.6% |
| 120-150k | 4,639 | 26.2% |
| 150k+ | 7,916 | 27.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 20,171 | 25.1% |
| Petrol | 1,276 | 20.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,281 | 26.6% |
| 2022 | 4,515 | 25.2% |
| 2023 | 4,352 | 24.0% |
| 2024 | 4,179 | 23.8% |
| 2025 | 4,120 | 24.4% |
What to check before buying a 1998 Defender
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 16.9% of tests. Start there.
- Lighting & signalling (16.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (10.8% 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.
- Body, structure & corrosion (9.8% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
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 Land Rover Defenders pass their MOT?
75.2% of the 21,447 1998 Land Rover Defender MOT tests in this dataset passed — a 24.8% fail rate.
What is the most common MOT failure on a 1998 Land Rover Defender?
Lighting & signalling, recorded in 16.9% of tests, followed by suspension (10.8%).
Does the 1998 Defender get worse with mileage?
Its MOT fail rate rises from 18.7% in the 0-30k band to 27.0% in the 150k+ band.
Methodology & source. Based on 21,447 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.