1999 Chrysler Jeep Wrangler — MOT failures & pass rate
279 MOT tests on the 1999 Chrysler Jeep Wrangler are in this dataset, and 76.7% of them passed. Against all cars of a similar age (26.1% fail rate), the 1999 Wrangler comes out 2.8pp better. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
Lighting & signalling dominates the failure mix at 17.9% of all tests — 7.5 points clear of suspension, so it is the first thing to check.
At component level the recurring items are headlamp, service brake performance and headlamp aim — headlamp alone was recorded 19 times.
Mileage is the strongest signal on the record: 15.1% of 30-60k cars fail, rising to 33.3% once past 120-150k — 2.2× the risk.
Advisories point at the next bill rather than this one: suspension was flagged on 38.4% of tests without failing them.
The trend is improving — the fail rate fell from 26.2% in 2021 to 23.1% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 17.9% | 50 |
| 2 | Suspension | 10.4% | 29 |
| 3 | Brakes | 9.0% | 25 |
| 4 | Visibility | 5.4% | 15 |
| 5 | Body, structure & corrosion | 5.4% | 15 |
| 6 | Emissions & environmental | 3.9% | 11 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp | 19 |
| 2 | Service brake performance | 19 |
| 3 | Headlamp aim | 18 |
| 4 | Catalyst emissions | 12 |
| 5 | Service brake imbalance | 12 |
| 6 | Position lamp | 11 |
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 | 38.4% | 107 |
| 2 | Brakes | 26.9% | 75 |
| 3 | Steering | 16.5% | 46 |
| 4 | Body, structure & corrosion | 15.8% | 44 |
| 5 | Emissions & environmental | 15.8% | 44 |
| 6 | Other defects | 14.0% | 39 |
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 | 53 | 15.1% |
| 60-90k | 97 | 26.8% |
| 90-120k | 83 | 20.5% |
| 120-150k | 33 | 33.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 65 | 26.2% |
| 2022 | 58 | 25.9% |
| 2023 | 54 | 18.5% |
| 2024 | 50 | 22.0% |
| 2025 | 52 | 23.1% |
What to check before buying a 1999 Wrangler
On a 1999 Wrangler, lighting & signalling is what the MOT record says goes wrong most — it appeared in 17.9% of tests. Check these areas before you commit.
- Lighting & signalling (17.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (10.4% 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 (9.0% 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 1999 Chrysler Jeep Wranglers pass their MOT?
76.7% of the 279 1999 Chrysler Jeep Wrangler MOT tests in this dataset passed — a 23.3% fail rate.
What is the most common MOT failure on a 1999 Chrysler Jeep Wrangler?
Lighting & signalling, recorded in 17.9% of tests, followed by suspension (10.4%).
Does the 1999 Wrangler get worse with mileage?
Its MOT fail rate rises from 15.1% in the 30-60k band to 33.3% in the 120-150k band.
Methodology & source. Based on 279 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.