BMW 840I AUTO (2021)
Running costs, common problems, and reliability data based on 419 real MOT tests in 2024.
MOT Pass Rate
85%
Total Tests (2024)
419
Avg Mileage
25,806 mi
Est. Annual Cost
£2,187
Is the 2021 BMW 840I AUTO reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 3 years old, 85% of BMW 840I AUTOs from 2021 passed their MOT first time in 2024. That's based on 419 tests across the UK. The average mileage at this age is 25,806 miles.
How does the 2021 BMW 840I AUTO compare?
Mileage Analysis
The average 2021 BMW 840I AUTO has 25,806 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
Best year to buy a BMW 840I AUTO?
The most reliable year is the 2020 model with a 93% MOT pass rate, while the 2021 model has the lowest at 85%. Consider a different year if reliability is a priority.
How much does a 2021 BMW 840I AUTO 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 840I AUTO by Year
Checking a specific BMW 840I AUTO?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 BMW 840I AUTO
The 2021 BMW 840I AUTO is a premium performance with a 2998cc petrol engine. 419 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It sits in the bottom 92% of 2021 cars for MOT pass rates.
With an average of 25,806 miles at 3 years old, BMW 840I AUTO owners drive about as much as the UK average.
2021 BMW 840I AUTO Fuel Costs
The 2998cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 BMW 840I AUTO?
Total estimated annual running cost is £2,187 (£182/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 85% pass rate. Keeping on top of servicing will help avoid surprises.
BMW 840I AUTO Reliability Trend
The BMW 840I AUTO has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.
Buying a Used 2021 BMW 840I AUTO
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet.
Alternatives to the 2021 BMW 840I AUTO
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- BMW 5 SERIES (2019) 92% pass rate (+7%) from 33,766 tests
- BMW X3 (2019) 92% pass rate (+7%) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (+8%) from 30,341 tests
- BMW X5 (2019) 92% pass rate (+7%) from 23,506 tests