Is the 2018 BMW X6 reliable?

Excellent reliability. Very few MOT failures. 92% of BMW X6s from 2018 passed their MOT first time in 2026, based on 5,522 tests. That's 10 points above the national average of 82%.

How much does a 2018 BMW X6 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 2018 BMW X6?

The 2018 BMW X6 has a 92% MOT pass rate based on 5,522 tests in 2026. This ranks 228 out of 649 cars from 2018.

Which year BMW X6 is most reliable?

The 2016 BMW X6 has the highest MOT pass rate at 93%. The least reliable year is 2008 at 82%.

What is the average mileage for a 2018 BMW X6?

The average mileage for a 2018 BMW X6 is 54,052 miles, which is in line with the expected 59,200 miles for a 8-year-old car, suggesting normal everyday use.

BMW X6 (2018)

Running costs, reliability data, and common problems from 5,522 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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Diesel2993cc8 years old5,522 tests54k 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 BMW brand average of 88%.

At 8 years old, 92% of BMW X6s from 2018 passed their MOT first time in 2026. That's based on 5,522 tests across the UK. The average mileage at this age is 54,052 miles.

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How Does It Compare?

Rank among 2018 cars228th of 649(top 35%)

Rank among BMW models450th of 1,564(top 29%)

vs national average+10%(82% avg)

vs 2018 cars average+3%(89% avg)

vs BMW average+4%(88% avg)

Mileage Analysis

54,052

Average miles

59,200

Expected for age

The average 2018 BMW X6 has 54,052 miles on the clock, which is in line with the expected 59,200 miles for a 8-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2016 model with a 93% MOT pass rate, while the 2008 model has the lowest at 82%. The 2018 sits between the two at 92%.

BMW X6 by Year

Year	Pass Rate	Tests	Avg Mileage
2019	91%	1,414	47,950 mi
2018	92%	5,522	54,052 mi
2017	92%	3,667	64,132 mi
2016	93%	4,566	71,331 mi
2015	91%	3,260	81,723 mi
2014	88%	3,247	90,615 mi
2013	88%	2,989	96,288 mi
2012	86%	2,858	103,018 mi
2011	86%	2,085	109,926 mi
2010	87%	2,186	113,093 mi
2009	85%	2,409	119,777 mi
2008	82%	1,117	123,091 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%

AUDI A5

2017 · 2967cc Diesel

£1,840/year

89%

-3%

FORD RANGER

2019 · 3198cc Diesel

£1,840/year

87%

-5%

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About the 2018 BMW X6

The 2018 BMW X6 is a premium performance with a 2993cc diesel engine. 5,522 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.

With an average of 54,052 miles at 8 years old, BMW X6 owners drive about as much as the UK average.

2018 BMW X6 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 2018 BMW X6?

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.

BMW X6 Reliability Trend

Newer BMW X6s show better MOT pass rates than older ones, with an average improvement of 6 percentage points.

Buying a Used 2018 BMW X6

At 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2016 model has the highest pass rate at 93%. With 5,522 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

Based on the 2018 BMW X6'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

Watch out

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

Watch out

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

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

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 2018 BMW X6 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
BMW X6(2018)	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
AUDI A5(2017)	89%	£1245	£190	Grp 30-42	£1840+£145
FORD RANGER(2019)	87%	£1245	£190	Grp 35-50	£1840+£145

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.