Acura
MDX
Owner report available
Mazda
CX-9
Owner report available
Acura MDX vs Mazda CX-9
The short answer
Based on available data, the Acura MDX comes out ahead of the Mazda CX-9 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
MDX
Overall
Owners broadly praise the MDX for reliability, driving dynamics, interior comfort, and value, with many describing it as the most reliable vehicle they have owned and reporting zero issues over tens of thousands of miles. The most consistent criticisms are poor fuel economy (especially on the Type S and in city driving), interior creaks and rattles, glitchy infotainment software, and frustrating dealer service experiences. The 3.5-liter V6 is widely regarded as exceptionally durable, while the Type S turbo V6 draws mixed feedback on reliability, with a few owners reporting serious electrical and mechanical failures.
Best version to buy
Insufficient owner data available to declare a consensus. The 3.5-liter V6 (non-Type S) draws the strongest reliability praise, with multiple owners calling it "God-tier" and "bulletproof," while the Type S turbo V6 has both strong defenders and a few reports of serious failures.
Known issues
- Every warning light illuminating with immediate-service message traced to a failed control panel: Frequency: isolated. Tailgate opening by itself while locked and parked: Frequency: isolated.
CX-9
Overall
Predominantly positive sentiment, with the vehicle widely praised for its exceptional driving dynamics, premium interior feel, and strong value proposition. Long-term owner reports consistently highlight its car-like, sporty handling, comfortable and quiet cabin, and upscale styling as key strengths. The consensus indicates high satisfaction among owners who prioritize driving enjoyment and a premium experience in a three-row family SUV.
Best version to buy
Higher trims such as Grand Touring and Signature are frequently mentioned for maximizing luxury features, premium materials, and technology content. The Signature trim, in particular, is associated with a highly upscale interior experience.
Known issues
- Cylinder head cracking / coolant leak in 2.5T engine: A design/manufacturing defect leading to coolant leaking into the engine, potentially causing catastrophic failure.
- High oil consumption in some later models: Mentioned alongside the cylinder head issue as a potential problem for some vehicles. Frequency: recurrent.
- Wide turning radius: Noted as requiring adjustment due to the vehicle's length. Frequency: isolated.
The verdict
The Acura MDX is the better choice for most buyers.
It has more power on its best-equipped version than the Mazda CX-9, based on the data above. If efficiency matters more to you than outright power, the Mazda CX-9 is worth a closer look instead.
Explore further
Common problems by model year
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Frequently asked questions
Which is more reliable, the Acura MDX or the Mazda CX-9?
Owner reports show similar reliability sentiment for the Acura MDX and the Mazda CX-9. Check the known issues listed above for specific differences between the two.
Which is better for families, the Acura MDX or the Mazda CX-9?
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
Which has better fuel economy, the Acura MDX or the Mazda CX-9?
The EPA rates the 2026 Acura MDX at 19–22 mpg combined and the 2023 Mazda CX-9 at 23 mpg, depending on the version.
Which is cheaper to maintain, the Acura MDX or the Mazda CX-9?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Acura MDX than the Mazda CX-9. See the known issues comparison above.