1998 Jeep Wrangler — MOT failures & pass rate
Across 1,270 MOT tests, the 1998 Jeep Wrangler recorded a 75.1% pass rate. Large SUVs of a similar age fail at 24.4%, so the 1998 Wrangler sits squarely on the average. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 19.0% of all tests — 8.0 points clear of brakes, so it is the first thing to check.
At component level the recurring items are headlamp aim, catalyst emissions and position lamp — headlamp aim alone was recorded 99 times.
A 150k+ example is materially riskier than a 0-30k one: 30.9% versus 11.1%.
Advisories point at the next bill rather than this one: suspension was flagged on 33.5% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 19.0% | 241 |
| 2 | Brakes | 11.0% | 140 |
| 3 | Suspension | 8.7% | 110 |
| 4 | Body, structure & corrosion | 6.6% | 84 |
| 5 | Emissions & environmental | 4.7% | 59 |
| 6 | Visibility | 4.7% | 59 |
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 | 99 |
| 2 | Catalyst emissions | 81 |
| 3 | Position lamp | 80 |
| 4 | Service brake performance | 71 |
| 5 | Stop lamp | 65 |
| 6 | Rear fog lamp | 52 |
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 | 33.5% | 425 |
| 2 | Brakes | 27.1% | 344 |
| 3 | Body, structure & corrosion | 17.1% | 217 |
| 4 | Steering | 11.0% | 140 |
| 5 | Other defects | 10.7% | 136 |
| 6 | Emissions & environmental | 10.7% | 136 |
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 | 36 | 11.1% |
| 30-60k | 199 | 22.1% |
| 60-90k | 465 | 24.1% |
| 90-120k | 355 | 26.5% |
| 120-150k | 121 | 27.3% |
| 150k+ | 94 | 30.9% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 259 | 25.9% |
| 2022 | 259 | 23.5% |
| 2023 | 238 | 22.7% |
| 2024 | 260 | 26.2% |
| 2025 | 254 | 26.0% |
What to check before buying a 1998 Wrangler
On a 1998 Wrangler, lighting & signalling is what the MOT record says goes wrong most — it appeared in 19.0% of tests. Check these areas before you commit.
- Lighting & signalling (19.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (11.0% 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.
- Suspension (8.7% 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.
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 Jeep Wranglers pass their MOT?
75.1% of the 1,270 1998 Jeep Wrangler MOT tests in this dataset passed — a 24.9% fail rate.
What is the most common MOT failure on a 1998 Jeep Wrangler?
Lighting & signalling, recorded in 19.0% of tests, followed by brakes (11.0%).
Does the 1998 Wrangler get worse with mileage?
Its MOT fail rate rises from 11.1% in the 0-30k band to 30.9% in the 150k+ band.
Methodology & source. Based on 1,270 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.