MOT performance
Jaguar XJ diesel: MOT pass rate and common failures
Of 24,671 MOT tests on diesel Jaguar XJs in 2023–2024 (on average 10.6 years old at test, median 80,484 miles), 79.1% passed first time, against 72.1% of 23,991 petrol Jaguar XJ tests. Allowing for age, mileage and fuel, diesel Jaguar XJs failed 34% less often than comparable cars — 0.66× against 0.70× for the Jaguar XJ as a whole.
24,671 MOT tests on 12,498 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 79.1% | ±0.5 pts (95%), n = 24,671 |
| All Jaguar XJs | 75.7% | n = 48,662 |
| Failures vs similar cars | 0.66× | same age, mileage and fuel = 1.00; Jaguar XJ overall 0.70× |
| Tests with a dangerous defect | 7.5% | n = 24,671 |
| Average age at test | 10.6 years | n = 24,671 |
| Registration years covered | 1990–2020 | DVSA first-use date |
Diesel against the other Jaguar XJ fuels
Official DVSA test results by fuel, with 73 Auto's adjusted ratio (failures against cars of the same age, mileage and fuel). The diesel cars were tested 10 years younger on average than the petrol ones, so the raw pass rates partly reflect age; the adjusted column doesn't.
| Fuel | Tests | Average age | First-time pass | vs similar cars | Dangerous |
|---|---|---|---|---|---|
| Diesel | 24,671 | 10.6 yrs | 79.1% | -34% | 7.5% |
| Petrol | 23,991 | 20.6 yrs | 72.1% | -27% | 6.1% |
Where diesel Jaguar XJs differ
- Body, chassis and structure: diesel Jaguar XJs failed 49% less often than the Jaguar XJ overall, relative to comparable cars (0.21× vs 0.40×).
- Noise, emissions and leaks: diesel Jaguar XJs failed 43% less often than the Jaguar XJ overall, relative to comparable cars (0.34× vs 0.60×).
- Steering: diesel Jaguar XJs failed 42% less often than the Jaguar XJ overall, relative to comparable cars (0.46× vs 0.78×).
| Area | Diesel (vs similar) | All Jaguar XJs (vs similar) |
|---|---|---|
| Suspension | 7.2% (-34%) | 8.7% (-29%) |
| Tyres | 6.3% (-7%) | 5.1% (-18%) |
| Lights, reflectors and electrical | 5.5% (-55%) | 7.2% (-53%) |
| Brakes | 4.0% (-49%) | 6.1% (-37%) |
| Driver's view of the road | 2.9% (-38%) | 4.0% (-32%) |
| Steering | 1.1% (-54%) | 2.2% (-22%) |
| Noise, emissions and leaks | 1.1% (-66%) | 3.3% (-40%) |
| Body, chassis and structure | 0.9% (-79%) | 2.4% (-60%) |
| Road wheels | 0.8% (+88%) | 0.6% (+52%) |
| Seat belts and airbags | 0.7% (-44%) | 1.1% (-40%) |
| Registration plates and VIN | 0.4% (+5%) | 0.4% (-31%) |
Most common diesel Jaguar XJ failure items
| Item | Area | Share of tests |
|---|---|---|
| Condition: has ply or cords exposed | Tyres | 2.07% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 2.04% |
| Pins and bushes: pin or bush excessively worn | Suspension | 1.84% |
| Coil spring: fractured or broken | Suspension | 1.84% |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps | Lights, reflectors and electrical | 1.33% |
Pass rate by age, by fuel
| Age at test (years) | diesel pass rate (tests) | petrol pass rate (tests) |
|---|---|---|
| 3-4 | 90.3% (1,261) | — |
| 5-6 | 87.6% (2,840) | — |
| 7-8 | 84.4% (3,819) | — |
| 9-10 | 79.3% (3,895) | 86.3% (277) |
| 11-12 | 77.7% (4,628) | 78.7% (525) |
| 13-15 | 74.3% (4,767) | 75.9% (1,084) |
| 16+ | 70.0% (3,343) | 71.3% (21,760) |
Jaguar XJ by registration year
Registration-year pages cover every fuel of that year.
- 2003 Jaguar XJ · 70.1%
- 2004 Jaguar XJ · 68.0%
- 2005 Jaguar XJ · 70.8%
- 2006 Jaguar XJ · 70.4%
- 2007 Jaguar XJ · 70.4%
- 2010 Jaguar XJ · 76.3%
- 2011 Jaguar XJ · 76.2%
- 2012 Jaguar XJ · 79.9%
- 2013 Jaguar XJ · 79.2%
- 2014 Jaguar XJ · 80.0%
- 2016 Jaguar XJ · 84.6%
What this does and doesn't tell you
Fuel is DVSA's recorded fuel type; plug-in and self-charging hybrids are grouped as hybrid. A difference between fuels can come from the engines themselves, or from how the cars are used — diesels typically cover more miles, and the adjusted ratio allows for mileage band but not for every difference in use. For one car, its own MOT history is the better guide: see MOT check.
Check a specific diesel Jaguar XJ
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.
Related
- All Jaguar XJ MOT results
- Jaguar XJ petrol · 72.1% first-time pass
- Check one car’s MOT history
- What a used car costs to own