BMW 6 SERIES (2018)
Running costs, common problems, and reliability data based on 3,656 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
3,656
Avg Mileage
56,355 mi
Est. Annual Cost
£1,772
Is the 2018 BMW 6 SERIES reliable?
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%.
At 6 years old, 91% of BMW 6 SERIESs from 2018 passed their MOT first time in 2024. That's based on 3,656 tests across the UK. The average mileage at this age is 56,355 miles.
How does the 2018 BMW 6 SERIES compare?
Mileage Analysis
The average 2018 BMW 6 SERIES has 56,355 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 6 SERIES?
The most reliable year is the 2020 model with a 93% MOT pass rate, while the 2005 model has the lowest at 80%. The 2018 sits between the two at 91%.
How much does a 2018 BMW 6 SERIES 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 6 SERIES by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2020 | 93% | 662 | 38,758 mi |
| 2019 | 92% | 2,297 | 51,326 mi |
| 2018 | 91% | 3,656 | 56,355 mi |
| 2017 | 88% | 632 | 62,077 mi |
| 2014 | 86% | 66 | 87,054 mi |
| 2013 | 88% | 1,897 | 91,528 mi |
| 2012 | 89% | 1,275 | 95,998 mi |
| 2011 | 89% | 247 | 80,577 mi |
| 2010 | 82% | 127 | 105,279 mi |
| 2009 | 86% | 125 | 110,442 mi |
| 2008 | 80% | 171 | 117,234 mi |
| 2007 | 90% | 203 | 114,661 mi |
| 2006 | 82% | 288 | 121,301 mi |
| 2005 | 80% | 147 | 116,696 mi |
| 1990 | 85% | 39 | 122,050 mi |
Checking a specific BMW 6 SERIES?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 BMW 6 SERIES
The 2018 BMW 6 SERIES is a premium with a 1998cc petrol engine. 3,656 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 56,355 miles at 6 years old, BMW 6 SERIES owners cover more miles than the average driver.
2018 BMW 6 SERIES Fuel Costs
The 1998cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 BMW 6 SERIES?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BMW 6 SERIES Reliability Trend
Newer BMW 6 SERIESs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.
Buying a Used 2018 BMW 6 SERIES
At 6 years old, the BMW 6 SERIES 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 2020 model has the highest pass rate at 93%.
Alternatives to the 2018 BMW 6 SERIES
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- FORD FOCUS (2016) 87% pass rate (-4%) from 109,880 tests
- VOLKSWAGEN GOLF (2019) 92% pass rate (+1%) from 89,653 tests
- FORD KUGA (2018) 90% pass rate (-1%) from 67,605 tests
- MINI COOPER (2018) 92% pass rate (+1%) from 55,706 tests