Aston Martin
DBX
BMW
X6 M
Aston Martin DBX vs BMW X6 M: 2025 Comparison
The short answer
Based on available data, the Aston Martin DBX comes out ahead of the BMW X6 M on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
DBX
Overall
Sentiment is sharply divided. The vehicle is universally praised for its stunning exterior design, with frequent mentions of its gorgeous appearance, beautiful color options, and the "exotic shock factor" it provides. The interior is also noted for its "absolutely amazing" quality and materials.
Best version to buy
Insufficient owner data available to declare a consensus "best" trim. The DBX 707 high-performance variant is mentioned in the context of performance targets and a planned successor (DBX S).
Known issues
- ⚠Severe electrical system failures: Recurrent 12V/48V system warnings, complete battery drain, vehicle refusing to start, requiring multiple dealer visits and tows. Frequency: very frequent.
- ⚠General poor reliability / build quality: Multiple issues including loose shields causing rattles, failed window actuators, cracking subwoofer brackets, windscreen wipers detaching, and doors/windows misaligned from factory.
- ⚠Outdated/inferior technology: Criticisms of the older Mercedes COMAND infotainment system (in pre-refresh models), lack of modern driver assistance features (e.g., semi-autonomous driving) compared to German competitors.
X6 M
Overall
Mixed sentiment with a clear divide between ownership phases. The vehicle is universally praised for its immense performance, handling that defies its SUV classification, and the special, hand-built nature of its S63 engine. Long-term owner reports describe it as a highly capable and enjoyable daily driver that can handle imperfect roads and conditions while delivering sports car-like dynamics.
Best version to buy
The full X6 M is strongly recommended over the non-M X6 models (e.g., xDrive40i, M50i/M60i) for several reasons. The hand-built S63 engine in the M is reported to be more reliable than the standard N63 twin-turbo V8 found in non-M models, which is notorious for oil consumption and injector issues.
Known issues
- ⚠Catastrophic drivetrain failures: includes repeated "Drivetrain" warning messages accompanied by a complete loss of power, requiring the vehicle to be towed. One owner reported 14 separate incidents within two years.
- ⚠Engine (S63/N63) reliability concerns: issues include failing fuel injectors (often requiring replacement of all eight), excessive oil consumption, and potential for severe cylinder wall wear.
- ⚠High repair and maintenance costs: parts like laser headlights are cited as costing over $6,000 USD each. Brakes are expensive but long-lasting. General service costs are high. Frequency: very frequent.
The verdict
The Aston Martin DBX is the better choice for most buyers.
It has more power on its best-equipped version than the BMW X6 M, based on the data above. If efficiency matters more to you than outright power, the BMW X6 M is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Aston Martin DBX or the BMW X6 M?
Owner reports show similar reliability sentiment for the Aston Martin DBX and the BMW X6 M. Check the known issues listed above for specific differences between the two.
Which is better for families, the Aston Martin DBX or the BMW X6 M?
Both seat a similar number of passengers based on our data. The Aston Martin DBX is classed as a SUV, the BMW X6 M as a SAC, which affects cargo space and ride height for family use.
Which has better fuel economy, the Aston Martin DBX or the BMW X6 M?
Fuel consumption data is limited for one or both models. Check the specs table above for the figures available on each catalogued version.
Which is cheaper to maintain, the Aston Martin DBX or the BMW X6 M?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the BMW X6 M than the Aston Martin DBX. See the known issues comparison above.