BMW 340I (2020)
Running costs, common problems, and reliability data based on 30 real MOT tests in 2024.
MOT Pass Rate
80%
Total Tests (2024)
30
Avg Mileage
36,809 mi
Est. Annual Cost
£2,187
Is the 2020 BMW 340I reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the BMW brand average of 88%.
At 4 years old, 80% of BMW 340Is from 2020 passed their MOT first time in 2024. That's based on 30 tests across the UK. The average mileage at this age is 36,809 miles.
How does the 2020 BMW 340I compare?
Mileage Analysis
The average 2020 BMW 340I has 36,809 miles on the clock, which is above the expected 29,600 miles for a 4-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 340I?
The most reliable year is the 2016 model with a 95% MOT pass rate, while the 2019 model has the lowest at 90%. The 2020 sits between the two at 80%.
How much does a 2020 BMW 340I 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 340I by Year
Checking a specific BMW 340I?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2020 BMW 340I
The 2020 BMW 340I is a premium performance with a 2998cc petrol engine. 30 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It sits in the bottom 98% of 2020 cars for MOT pass rates.
With an average of 36,809 miles at 4 years old, BMW 340I owners cover more miles than the average driver.
2020 BMW 340I 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 2020 BMW 340I?
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 80% pass rate. Keeping on top of servicing will help avoid surprises.
BMW 340I Reliability Trend
The BMW 340I has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Buying a Used 2020 BMW 340I
At 4 years old, the BMW 340I 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 95%. Note: with only 30 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2020 BMW 340I
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 (2018) 91% pass rate (+11%) from 40,272 tests
- LAND ROVER RANGE ROVER SPORT (2018) 93% pass rate (+13%) from 34,257 tests
- BMW X3 (2019) 92% pass rate (+12%) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (+13%) from 30,341 tests