Chevrolet
Impala
Mazda
6
Chevrolet Impala vs Mazda 6: 2018 Comparison
The short answer
Based on available data, the Chevrolet Impala comes out ahead of the Mazda 6 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
Impala
Overall
Owner sentiment is highly fragmented across generations, with no single dominant consensus. For classic models (1959, 1963, 1994-1996 SS), sentiment is overwhelmingly positive, centered on iconic styling, collectibility, and performance (e.g., 409 V8, LT1 V8). For the mainstream front-wheel-drive generations (circa 2000-2016), sentiment is mixed to negative, dominated by discussions of mechanical failures, poor reliability, and high repair costs.
Best version to buy
1994-1996 Impala SS: This generation is consistently highlighted as a desirable, powerful, and iconic collectible. The 2014+ generation is also singled out as the best modern version for its refined driving dynamics and quality.
Known issues
- ⚠Transmission failure: Complete failure or severe slipping, particularly in high-mileage examples (e.g., over 200,000 miles). Frequency: recurrent.
- ⚠Engine mechanical problems: Head gasket failures on 3.5L and 3.9L V6 engines; oil leaks; timing component failures; oil pressure issues related to switches and filter housing gaskets. Frequency: recurrent.
- ⚠Electrical and starting issues: Intermittent no-start conditions with clicking noises; battery and alternator failures; systems resetting (time/date) during starting problems. Frequency: recurrent.
6
Overall
Sentiment is broadly positive, with the Mazda 6 consistently praised for its reliability, longevity, and driving dynamics. Long-term owner reports frequently highlight the vehicle's ability to reach high mileages (e.g., 250,000 miles, 377,000 miles) with minimal major issues when properly maintained. The car is commended for its handsome design, well-regarded interior quality in its class, and a driving experience often described as more engaging than key competitors like the Toyota Camry and Honda Accord.
Best version to buy
Insufficient owner data available to declare a single "best" trim or version across all generations. Feedback is divided by powertrain preference.
Known issues
- ⚠Thin paint / paint chipping and fading: noted on multiple generations, particularly older models. Frequency: recurrent.
- ⚠Rust issues: especially on heat shields and exhaust components, causing rattles; mentioned on pre-2014 models and some later examples. Frequency: recurrent.
- ⚠Steering wheel vibration / shake at highway speeds (55-65 mph / 89-105 km/h): often attributed to tire balance rather than mechanical fault. Frequency: isolated.
The verdict
The Chevrolet Impala is the better choice for most buyers.
It has more power on its best-equipped version than the Mazda 6, based on the data above. If efficiency matters more to you than outright power, the Mazda 6 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Chevrolet Impala or the Mazda 6?
Owner reports show similar reliability sentiment for the Chevrolet Impala and the Mazda 6. Check the known issues listed above for specific differences between the two.
Which is better for families, the Chevrolet Impala or the Mazda 6?
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 Chevrolet Impala or the Mazda 6?
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 Chevrolet Impala or the Mazda 6?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Chevrolet Impala than the Mazda 6. See the known issues comparison above.