Jaguar XJ reliability, MPG and running costs
Figures updated
The Jaguar XJ is a luxury car. In 2024 MOT tests it scored 152 for reliability (100 is average), ranking 58 of 442, and 23.5% failed first time against a UK average of 28.5%. Its most common MOT failure is ball joint dust cover (2.8% of tests).
Ranked 58 of 442 cars in the 2024 MOT Reliability League
In 2024, 17,410 Jaguar XJs aged 3 to 20 had an MOT and 23.5% failed first time (UK average 28.5%). Taking age and mileage into account, the Jaguar XJ is 34% less likely to fail than the average car of the same age and mileage.
First-time fail rate
23.5%
UK 28.5%
Fail rate at 3 years
–
UK 12.7%
Average miles a year
7,200
Typical age at test: 13 years
Jaguar XJ MOT failure rate by age
Most common Jaguar XJ MOT faults
- Ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt2.8% of tests
- Pins and bushes: pin or bush excessively worn2.2% of tests
- Tread depth: tread depth below requirements of 1.6mm1.9% of tests
- Condition: has ply or cords exposed1.8% of tests
- Malfunction indicator lamp: inoperative or indicates a malfunction1.6% of tests
- Coil spring: fractured or broken1.4% of tests
What the Jaguar XJ fails on
| Area | Tests failing | vs similar cars |
|---|---|---|
| Suspension | 8.4% | ▼ 35% less often |
| Lights and electrics | 6.6% | ▼ 58% less often |
| Tyres | 5.8% | ▼ 17% less often |
| Brakes | 5.6% | ▼ 41% less often |
| Visibility | 3.5% | ▼ 39% less often |
| Steering | 2.3% | ▼ 21% less often |
| Exhaust and emissions | 2.2% | ▼ 53% less often |
| Body and structure | 1.0% | ▼ 81% less often |
| Wheels | 0.8% | ▲ 1.7× as often |
| Seat belts and airbags | 0.7% | ▼ 54% less often |
What MPG does the Jaguar XJ do?
Official economy for the Jaguar XJ ranges from 20.2 to 49.6mpg across the 47 versions listed by the Vehicle Certification Agency (2004–2019). A typical petrol version manages 24.9mpg and a typical diesel 44.8mpg. Expect 10–15% less in real-world driving.
Work out a journey's fuel costHow much is road tax on a Jaguar XJ?
Any Jaguar XJ first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Jaguar XJ registered between March 2001 and March 2017 is taxed on its CO2: £225 to £790 a year.
Work out tax for a specific carJaguar XJ specs and running costs
Official figures for 47 versions sold in the UK between 2004 and 2019.
Fuel types
Diesel, Petrol
Official economy
20.2–49.6 mpg
CO2
149–330 g/km
Power
300 PS
| Version | Fuel | Economy | CO2 | Car tax |
|---|---|---|---|---|
| XJ Saloon 3.0 V6 Diesel 300PS RWD Auto LWB HIGH300 PS · A8 · listed 2019 | Diesel | – | – | – |
| XJ Saloon 3.0 V6 Diesel 300PS RWD Auto LWB LOW300 PS · A8 · listed 2019 | Diesel | – | – | – |
| XJ Saloon 3.0 V6 Diesel 300PS RWD Auto SWB HIGH300 PS · A8 · listed 2019 | Diesel | – | – | – |
| XJ Saloon 3.0 V6 Diesel 300PS RWD Auto SWB LOW300 PS · A8 · listed 2019 | Diesel | – | – | – |
| XJ Saloon 3.0L TDV6 (300PS) Automatic (SWB & LWB) - Pirelli 19" tyresA8 · listed 2018 | Diesel | 49.6 mpg | 149g | £200 |
| XJ Saloon 3.0L TDV6 (300PS) Automatic (SWB & LWB) - Continental 20" tyresA8 · listed 2018 | Diesel | 48 mpg | 155g | £200 |
| XJ Saloon 3.0L TDV6 (300PS) Automatic (SWB & LWB) - Dunlop 20" tyresA8 · listed 2018 | Diesel | 46.3 mpg | 159g | £200 |
| XJ Saloon 3.0L V6 (340PS) Automatic RWD (SWB & LWB)A8 · listed 2018 | Petrol | 31 mpg | 211g | £200 |
| XJ Saloon 5.0L V8 (510PS & 575PS) Automatic RWD (SWB & LWB)A8 · listed 2018 | Petrol | 25.5 mpg | 264g | £200 |
| XJ Saloon 2.0L GTDI (240PS) Automatic (SWB)A8 · listed 2017 | Petrol | 33.6 mpg | 199g | £200 |
| XJ Saloon 5.0L V8 (510PS & 550PS) Automatic RWD (SWB & LWB)A8 · listed 2017 | Petrol | 25.5 mpg | 264g | £200 |
| XJ 3.0L TDV6 LWBA8 · listed 2015 | Diesel | 44.8 mpg | 167g | £325 |
| XJ 3.0L TDV6 SWBA8 · listed 2015 | Diesel | 46.3 mpg | 159g | £275 |
| XJ Supersport 5.0L V8 SuperchargedA8 · listed 2015 | Petrol | 24.4 mpg | 270g | £790 |
| XJ 3.0L V6 Supercharged (SWB & LWB)A8 · listed 2015 | Petrol | 29.4 mpg | 224g | £445 |
Economy and CO2 are official NEDC (before 2018) or WLTP figures. Car tax is the yearly rate at current rates for a car first registered in the year listed, before any expensive car supplement. Showing the 15 most recent of 47 versions.
What a Jaguar XJ costs to fuel
- petrol, typical official 24.9mpg…
- diesel, typical official 44.8mpg…
Official figures are usually 10–15% better than real-world driving.
Work out a journey in a Jaguar XJBuying a used Jaguar XJ?
Check the MOT history of the exact car: every result, advisory and mileage reading, free.
Compare the Jaguar XJ with other luxury cars
Reliability, economy, car tax and running costs side by side.
Other Jaguar models
Frequently asked questions
›Is the Jaguar XJ reliable?
Its MOT record is better than average: the Jaguar XJ is 34% less likely to fail than the average car of the same age and mileage, with a reliability score of 152 in our 2024 league (100 is average).
›What are common problems with the Jaguar XJ?
The most common MOT fault is “Ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt”, found in 2.8% of tests.
›What MPG does the Jaguar XJ do?
Official economy for the Jaguar XJ ranges from 20.2 to 49.6mpg across the 47 versions listed by the Vehicle Certification Agency (2004–2019). A typical petrol version manages 24.9mpg and a typical diesel 44.8mpg. Expect 10–15% less in real-world driving.
›How much is road tax on a Jaguar XJ?
Any Jaguar XJ first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Jaguar XJ registered between March 2001 and March 2017 is taxed on its CO2: £225 to £790 a year.
›How many Jaguar XJs fail their MOT?
23.5% of Jaguar XJs aged 3 to 20 failed their MOT first time in 2024.
Sources: DVSA anonymised MOT tests 2024, all versions of the Jaguar XJ combined (Open Government Licence v3.0); official economy and CO2 from Vehicle Certification Agency data, © Crown copyright. VCA cannot accept liability for its accuracy. How we calculate the league.