Is the 2020 JAGUAR XJ reliable?

Excellent reliability. Very few MOT failures. 92% of JAGUAR XJs from 2020 passed their MOT first time in 2026, based on 411 tests. That's 10 points above the national average of 82%.

How much does a 2020 JAGUAR XJ cost to run?

Estimated annual running cost is £1,695 (£141/month), including £1245 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2020 JAGUAR XJ?

The 2020 JAGUAR XJ has a 92% MOT pass rate based on 411 tests in 2026. This ranks 1370 out of 2596 cars from 2020.

Which year JAGUAR XJ is most reliable?

The 2019 JAGUAR XJ has the highest MOT pass rate at 94%. The least reliable year is 2002 at 77%.

JAGUAR XJ (2020)

Q: What is the average mileage for a 2020 JAGUAR XJ?

The average mileage for a 2020 JAGUAR XJ is 32,227 miles, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 411 real MOT tests.

Annual Cost

£1,695

£141/month

MOT Pass Rate

92%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 30-42

2993cc Diesel

Great Choice

92% pass rate, £1695/year to run. 10 points above average.

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Diesel2993cc6 years old411 tests32k miles avg

Annual Running Costs

Fuel (Diesel, 2993cc)

~40 mpg

£1,245

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,695

Per month£141/mo

Per week£33/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

92% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%. It also outperforms the JAGUAR brand average of 88%.

At 6 years old, 92% of JAGUAR XJs from 2020 passed their MOT first time in 2026. That's based on 411 tests across the UK. The average mileage at this age is 32,227 miles.

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How Does It Compare?

Rank among 2020 cars1370th of 2,596(top 53%)

Rank among JAGUAR models107th of 299(top 36%)

vs national average+10%(82% avg)

vs 2020 cars average+0%(92% avg)

vs JAGUAR average+4%(88% avg)

Mileage Analysis

32,227

Average miles

44,400

Expected for age

The average 2020 JAGUAR XJ has 32,227 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

The most reliable year is the 2019 model with a 94% MOT pass rate, while the 2002 model has the lowest at 77%. The 2020 sits between the two at 92%.

JAGUAR XJ by Year

Year	Pass Rate	Tests	Avg Mileage
2020	92%	411	32,227 mi
2019	94%	1,023	35,571 mi
2018	93%	1,682	44,709 mi
2017	93%	2,143	54,518 mi
2016	91%	2,811	64,986 mi
2015	91%	2,316	67,462 mi
2014	89%	2,511	81,854 mi
2013	87%	2,758	93,880 mi
2012	89%	2,482	93,337 mi
2011	84%	4,043	100,648 mi
2010	84%	3,442	107,407 mi
2009	85%	1,332	97,971 mi
2008	82%	2,030	101,627 mi
2007	82%	2,721	103,444 mi
2006	82%	2,874	103,550 mi
2005	80%	2,105	106,159 mi
2004	78%	3,267	108,216 mi
2003	81%	3,134	110,063 mi
2002	77%	955	92,681 mi
2001	79%	972	91,862 mi
2000	78%	888	90,401 mi
1999	77%	1,298	91,922 mi
1998	77%	2,154	92,573 mi
1997	80%	2,029	105,434 mi
1996	82%	1,861	104,724 mi
1995	79%	1,401	101,040 mi
1994	86%	635	87,486 mi
1993	82%	401	88,629 mi
1992	82%	328	89,641 mi
1991	82%	243	95,193 mi
1990	86%	282	83,101 mi

Similar Cars to Consider

MERCEDES E

2019 · 2925cc Diesel

£1,690/year

90%

-2%

MERCEDES GLC

2018 · 2987cc Diesel

£1,690/year

91%

-1%

FORD RANGER

2019 · 3198cc Diesel

£1,840/year

87%

-5%

LAND ROVER RANGE ROVER VELAR

2018 · 2993cc Diesel

£1,690/year

91%

-1%

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About the 2020 JAGUAR XJ

The 2020 JAGUAR XJ is a premium performance with a 2993cc diesel engine. 411 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.

With an average of 32,227 miles at 6 years old, JAGUAR XJ owners tend to use this car less than the typical driver.

2020 JAGUAR XJ Fuel Costs

The 2993cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2020 JAGUAR XJ?

Total estimated annual running cost is £1,695 (£141/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

JAGUAR XJ Reliability Trend

Newer JAGUAR XJs show better MOT pass rates than older ones, with an average improvement of 7 percentage points.

Buying a Used 2020 JAGUAR XJ

At 6 years old, the JAGUAR XJ offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2019 model has the highest pass rate at 94%.

Common Issues to Watch For

Based on the 2020 JAGUAR XJ's fuel type, age, and engine size, these are the most likely problem areas to check.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Medium risk

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Dual Mass Flywheel

Medium risk

Larger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2020 JAGUAR XJ stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
JAGUAR XJ(2020)	92%	£1245	£195	Grp 30-42	£1695
MERCEDES E(2019)	90%	£1245	£190	Grp 30-42	£1690-£5
MERCEDES GLC(2018)	91%	£1245	£190	Grp 30-42	£1690-£5
FORD RANGER(2019)	87%	£1245	£190	Grp 35-50	£1840+£145
LAND ROVER RANGE ROVER VELAR(2018)	91%	£1245	£190	Grp 30-42	£1690-£5

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.