ASTON MARTIN DBX (2021)
Running costs, common problems, and reliability data based on 34 real MOT tests in 2024.
MOT Pass Rate
97%
Total Tests (2024)
34
Avg Mileage
16,258 mi
Est. Annual Cost
£2,037
Is the 2021 ASTON MARTIN DBX reliable?
Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%.
At 3 years old, 97% of ASTON MARTIN DBXs from 2021 passed their MOT first time in 2024. That's based on 34 tests across the UK. The average mileage at this age is 16,258 miles.
How does the 2021 ASTON MARTIN DBX compare?
Mileage Analysis
The average 2021 ASTON MARTIN DBX has 16,258 miles on the clock, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
How much does a 2021 ASTON MARTIN DBX 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.
Checking a specific ASTON MARTIN DBX?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 ASTON MARTIN DBX
The 2021 ASTON MARTIN DBX is a luxury with a 4000cc petrol engine. 34 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 13% of all 2021 cars for reliability.
With an average of 16,258 miles at 3 years old, ASTON MARTIN DBX owners tend to use this car less than the typical driver.
2021 ASTON MARTIN DBX Fuel Costs
The 4000cc 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 ASTON MARTIN DBX?
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 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 ASTON MARTIN DBX
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. Note: with only 34 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 ASTON MARTIN DBX
The ASTON MARTIN DBX is actually the most reliable option among similar petrol luxurys from this era. Here are comparable petrol cars with similar engines:
- MERCEDES C (2019) 91% pass rate (-6%) from 52,838 tests
- PORSCHE CAYENNE (2019) 95% pass rate (-2%) from 9,063 tests
- PORSCHE 911 (2019) 97% pass rate (same) from 7,188 tests
- AUDI A6 (2020) 94% pass rate (-3%) from 3,470 tests