BMW X6 (2018)
Running costs, common problems, and reliability data based on 5,522 real MOT tests in 2024.
MOT Pass Rate
92%
Total Tests (2024)
5,522
Avg Mileage
54,052 mi
Est. Annual Cost
£1,690
Is the 2018 BMW X6 reliable?
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 6 years old, 92% of BMW X6s from 2018 passed their MOT first time in 2024. That's based on 5,522 tests across the UK. The average mileage at this age is 54,052 miles.
How does the 2018 BMW X6 compare?
Mileage Analysis
The average 2018 BMW X6 has 54,052 miles on the clock, which is above the expected 44,400 miles for a 6-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a BMW X6?
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%.
How much does a 2018 BMW X6 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
BMW X6 by Year
Checking a specific BMW X6?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
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 2024, 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 6 years old, BMW X6 owners cover more miles than the average driver.
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 £1,690 (£141/month), broken down as £1245 fuel, £190 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 6 years old, the BMW X6 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 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.
Alternatives to the 2018 BMW X6
The BMW X6 is actually the most reliable option among similar diesel premium performances from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-2%) from 41,000 tests
- MERCEDES GLC (2018) 91% pass rate (-1%) from 40,494 tests
- AUDI A5 (2017) 89% pass rate (-3%) from 33,531 tests
- FORD RANGER (2019) 87% pass rate (-5%) from 32,194 tests