BMW X4 (2021)
Running costs, common problems, and reliability data based on 251 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
251
Avg Mileage
27,663 mi
Est. Annual Cost
£2,037
Is the 2021 BMW X4 reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 3 years old, 94% of BMW X4s from 2021 passed their MOT first time in 2024. That's based on 251 tests across the UK. The average mileage at this age is 27,663 miles.
How does the 2021 BMW X4 compare?
Mileage Analysis
The average 2021 BMW X4 has 27,663 miles on the clock, which is above the expected 22,200 miles for a 3-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 X4?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2015 model has the lowest at 88%. The 2021 sits between the two at 94%.
How much does a 2021 BMW X4 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 X4 by Year
Checking a specific BMW X4?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 BMW X4
The 2021 BMW X4 is a premium performance with a 2998cc petrol engine. 251 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 27,663 miles at 3 years old, BMW X4 owners cover more miles than the average driver.
2021 BMW X4 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 X4?
Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BMW X4 Reliability Trend
Newer BMW X4s show better MOT pass rates than older ones, with an average improvement of 5 percentage points.
Buying a Used 2021 BMW X4
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. If you're flexible on year, the 2020 model has the highest pass rate at 94%.
Alternatives to the 2021 BMW X4
The BMW X4 is actually the most reliable option among similar petrol premium performances from this era. Here are comparable petrol cars with similar engines:
- BMW 5 SERIES (2019) 92% pass rate (-2%) from 33,766 tests
- BMW X3 (2019) 92% pass rate (-2%) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (-1%) from 30,341 tests
- BMW X5 (2019) 92% pass rate (-2%) from 23,506 tests