2018 Jaguar Xjr — MOT failures & pass rate
The 2018 Jaguar Xjr passed 91.6% of its 476 recorded MOT tests. Against all cars of a similar age (10.9% fail rate), the 2018 Xjr comes out 2.5pp better. Failures cluster in tyres, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — tyres (5.5%) and lighting & signalling (3.1%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, headlamp aim and registration plates — tread depth alone was recorded 9 times.
A 60-90k example is materially riskier than a 0-30k one: 14.0% versus 4.1%.
Advisories point at the next bill rather than this one: tyres was flagged on 23.1% of tests without failing them.
The trend is worsening — 5.6% of tests failed in 2021 against 13.0% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.5% | 26 |
| 2 | Lighting & signalling | 3.1% | 15 |
| 3 | Brakes | 0.8% | 4 |
| 4 | Suspension | 0.8% | 4 |
| 5 | Visibility | 0.8% | 4 |
| 6 | Other defects | 0.6% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 9 |
| 2 | Headlamp aim | 9 |
| 3 | Registration plates | 4 |
| 4 | Washers | 3 |
| 5 | Pins and bushes | 3 |
| 6 | Brake pads | 2 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 23.1% | 110 |
| 2 | Brakes | 12.6% | 60 |
| 3 | Other defects | 4.0% | 19 |
| 4 | Suspension | 3.4% | 16 |
| 5 | Visibility | 1.9% | 9 |
| 6 | Lighting & signalling | 1.3% | 6 |
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 | 219 | 4.1% |
| 30-60k | 202 | 11.4% |
| 60-90k | 43 | 14.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 108 | 5.6% |
| 2022 | 92 | 5.4% |
| 2023 | 96 | 8.3% |
| 2024 | 88 | 10.2% |
| 2025 | 92 | 13.0% |
What to check before buying a 2018 Xjr
On a 2018 Xjr, tyres is what the MOT record says goes wrong most — it appeared in 5.5% of tests. Check these areas before you commit.
- Tyres (5.5% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Lighting & signalling (3.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (0.8% 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 2018 Jaguar Xjrs pass their MOT?
91.6% of the 476 2018 Jaguar Xjr MOT tests in this dataset passed — a 8.4% fail rate.
What is the most common MOT failure on a 2018 Jaguar Xjr?
Tyres, recorded in 5.5% of tests, followed by lighting & signalling (3.1%).
Does the 2018 Xjr get worse with mileage?
Its MOT fail rate rises from 4.1% in the 0-30k band to 14.0% in the 60-90k band.
Methodology & source. Based on 476 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.