Mazda6 Reliability: Best Years, Years to Avoid, Common Problems, Repair Costs & Lifespan

The Mazda6 has generally been one of the more reliable midsize sedans of its era, particularly when equipped with Mazda's naturally aspirated four-cylinder engines and conventional automatic transmissions. It also offers something many dependable family sedans do not: genuinely engaging steering and handling.

Reliability does vary by generation, however. Early Mazda6 models are now old enough that rust, suspension wear, oil leaks, and previous maintenance often matter more than the original factory reliability record. The 2009-2013 generation improved in several areas but has its own age-related concerns. The redesigned 2014-2021 Mazda6 is generally the strongest overall used-car choice, with the naturally aspirated 2.5-liter Skyactiv engine standing out as the lower-risk long-term powertrain.

The later turbocharged Mazda6 offers much stronger acceleration, but it also adds mechanical complexity. For a buyer planning to keep the car well beyond 100,000 miles, I would generally favor a well-maintained naturally aspirated Mazda6 over an otherwise comparable turbo model unless the additional performance is especially important.

In This Guide You'll Learn

• Which Mazda6 years are generally the best used-car choices
• Which Mazda6 years deserve more caution
• How long a Mazda6 can realistically last
• The most common Mazda6 problems by generation
• Which Mazda6 engine is the best choice for long-term reliability
• How Mazda6 automatic and manual transmissions hold up
• Whether a high-mileage Mazda6 can still be a good buy

However, if you're also considering a brand-new Mazda6 or other new vehicle, you may want to come back to this and take a look at a handy technique that locates the dealer most ready to make concessions.

Mazda6 Reliability Overview

Overall, the Mazda6 has an above-average reliability record for a midsize sedan. Its strongest versions combine relatively straightforward naturally aspirated engines with traditional geared automatic or manual transmissions rather than continuously variable transmissions.

That basic mechanical layout is one of the Mazda6's advantages as a used car. Mazda achieved good fuel economy without relying heavily on the type of CVT transmissions that have caused expensive problems in several competing sedans.

The best used Mazda6 for most buyers is not necessarily the newest one. A well-maintained 2016-2020 naturally aspirated Mazda6 can be a particularly appealing combination of reliability, driving enjoyment, fuel economy, and reasonable mechanical complexity.

Older Mazda6 models can also last a long time, but corrosion and age-related wear increasingly determine whether an individual car is worth buying. At this point, a clean service history and rust-free body can be more important than choosing one particular early model year over another.

Mazda6 Reliability at a Glance

How Many Miles Can a Mazda6 Last?

A well-maintained Mazda6 can reasonably last around 200,000 miles, and carefully maintained examples can exceed 250,000 miles. As mileage climbs, however, the condition of the individual car matters far more than the number on the odometer alone.

A Mazda6 with 100,000 miles is not necessarily approaching the end of its useful life. On a properly serviced car, that can still represent years of remaining service. By 150,000 miles, buyers should pay closer attention to suspension components, engine mounts, cooling-system condition, oil leaks, wheel bearings, air-conditioning equipment, and other normal wear items.

At 200,000 miles and beyond, maintenance history becomes critical. A naturally aspirated Mazda6 that has received regular oil changes, cooling-system service, transmission maintenance, and prompt repairs can still be a reasonable purchase if the price reflects the mileage.

For a high-mileage purchase, I would generally rather own a 130,000-mile naturally aspirated Skyactiv Mazda6 with excellent maintenance records than an 80,000-mile example with poor service history, accident damage, or obvious neglect. Mileage alone is rarely the best measure of remaining life.

Mazda6 Reliability by Generation

2003-2008 Mazda6: First Generation

The first-generation Mazda6 established the model as a sportier alternative to the Toyota Camry and Honda Accord. U.S. buyers could choose between four-cylinder and V6 engines, along with manual and conventional automatic transmissions.

Mechanically, these cars can be durable, but age has become the dominant issue. Even a well-designed 2007 Mazda6 is now approaching two decades old, so deterioration of rubber components, suspension parts, seals, electrical accessories, and body structure deserves more attention than it did when the cars were newer.

The four-cylinder models offer simpler packaging and generally lower repair costs, while the V6 provides stronger acceleration but uses more fuel and gives the buyer more aging components to consider. At this stage, I would choose primarily by condition and maintenance rather than automatically favoring one engine.

Common 2003-2008 Mazda6 Problems

• Rust and corrosion: This is one of the most important concerns on older Mazda6 models, particularly cars that spent years in areas where road salt is heavily used.
• Suspension wear: Control-arm bushings, links, struts, and related components can produce clunks, looseness, or uneven tire wear as mileage increases.
• Engine mounts: Worn mounts can cause excess vibration, particularly while idling or shifting between drive and reverse.
• Oil leaks and age-related seepage: Seals and gaskets naturally become more prone to leakage as these cars age.
• Electrical and accessory problems: Window motors, door locks, sensors, air-conditioning components, and other accessories may require attention simply because of age.

Buyer Tip: Inspect the underside carefully. A 150,000-mile Mazda6 with a solid rust-free structure may be a much better purchase than a 90,000-mile car showing serious corrosion underneath.

Bottom Line: First-generation Mazda6 models can still make inexpensive transportation, but condition now matters much more than the exact model year. Avoid heavily rusted examples regardless of how attractive the price appears.

2009-2013 Mazda6: Second Generation

The second-generation Mazda6 became larger and more conventional while retaining much of the responsive handling that distinguished the model. U.S. versions were offered with a 2.5-liter four-cylinder or a more powerful 3.7-liter V6.

The 2.5-liter four-cylinder is generally the version I would favor today. It offers adequate performance, lower fuel consumption, easier service access, and less mechanical complexity than the V6. The 3.7-liter engine is considerably stronger, but buyers specifically seeking long-term economy and lower repair exposure will usually be better served by the four-cylinder.

These cars are now old enough that maintenance history and corrosion again become important. A properly maintained later second-generation car can still be a good budget sedan, but the redesigned 2014 Mazda6 brought major improvements in efficiency, styling, and powertrain technology.

Common 2009-2013 Mazda6 Problems

• Corrosion: Undercarriage and structural corrosion deserve close inspection, especially on cars from northern states.
• Suspension and steering wear: Bushings, links, bearings, and struts can develop noise or looseness at higher mileage.
• Engine mounts and vibration: Deteriorated mounts can transmit noticeable vibration into the cabin.
• Oil leaks and gasket seepage: Increasingly common simply because of vehicle age and mileage.
• Electrical and accessory issues: Aging switches, sensors, power accessories, and climate-control components may need repair.

Buyer Tip: If choosing between similar 2.5-liter four-cylinder and 3.7-liter V6 cars, the four-cylinder is usually the better fit for a buyer prioritizing fuel economy, simplicity, and lower long-term operating costs.

Bottom Line: The 2009-2013 Mazda6 can be a solid inexpensive sedan, particularly with the 2.5-liter four-cylinder, but it is overshadowed somewhat by the substantially improved third generation that followed.

2014-2021 Mazda6: Third Generation

The third-generation Mazda6 is the version I would recommend most often. It combined attractive styling, excellent handling, good fuel economy, and a relatively straightforward drivetrain with a much more modern interior.

Most 2014-2021 Mazda6 models use Mazda's 2.5-liter Skyactiv four-cylinder. In naturally aspirated form, this engine is one of the strongest reasons to consider the car. It provides enough power for normal driving without the additional heat, pressure, plumbing, and components associated with turbocharging.

Beginning with the 2018 model year, Mazda also offered a turbocharged 2.5-liter engine on upper trims. The turbo transforms the car's performance and makes the Mazda6 feel much stronger at highway speeds. It is not automatically an unreliable choice, but it is more mechanically complex.

For a buyer intending to keep the car for a very long time, I would normally choose the naturally aspirated engine. For someone who values stronger acceleration and is willing to accept somewhat greater long-term repair exposure, the turbo can be very appealing.

Common 2014-2021 Mazda6 Problems

• Infotainment problems: Some cars develop touchscreen or control-system issues, including the familiar Mazda infotainment "ghost touch" behavior on certain vehicles.
• Battery and electrical issues: Weak batteries can create warning lights and odd electronic behavior that sometimes appears more serious than the underlying problem.
• Suspension and brake wear: Higher-mileage cars may need struts, bushings, links, wheel bearings, or brake components.
• Later-model engine complexity: Turbocharged versions add components and operating stresses that naturally increase potential long-term repair costs compared with the naturally aspirated engine.
• High-mileage leaks and accessory wear: Even reliable third-generation cars eventually develop normal gasket, belt, tensioner, air-conditioning, and accessory-related repairs.

Buyer Tip: For the lowest-risk long-term Mazda6, I would focus first on a well-maintained naturally aspirated 2.5-liter car. A 2016-2020 example with good records offers an especially attractive balance of age, reliability, safety equipment, and price.

Bottom Line: The 2014-2021 Mazda6 is the strongest generation overall. Naturally aspirated versions are particularly attractive for buyers who want a midsize sedan capable of high mileage without the added complexity of a turbocharger.

Which Mazda6 Engine Is Most Reliable?

The naturally aspirated 2.5-liter Skyactiv four-cylinder used in the third-generation Mazda6 is the engine I would choose for the best combination of reliability, performance, fuel economy, and long-term repair risk.

It is powerful enough for everyday driving while avoiding the added complexity of a turbocharger. For buyers planning to own the car past 150,000 or 200,000 miles, simplicity becomes increasingly valuable.

The later 2.5-liter turbo is much quicker and can make the Mazda6 feel like an entirely different car. I would not avoid it solely because it is turbocharged, but I would insist on excellent service history and would expect potentially higher repair costs as the car ages.

The older 2.5-liter naturally aspirated engine in the 2009-2013 Mazda6 can also be durable. At this age, however, vehicle condition and maintenance history matter more than the engine's original reputation.

Which would I buy? On a limited budget, I would look for a clean 2009-2013 four-cylinder car. For the best overall balance, I would choose a 2016-2020 naturally aspirated 2.5-liter Mazda6. I would choose the turbo only if its extra performance were important enough to justify the additional mechanical complexity.

How Reliable Is the Mazda6 Transmission?

Transmission design is another reason the Mazda6 compares favorably with several competing midsize sedans. Mazda relied primarily on conventional geared automatic transmissions rather than switching the Mazda6 to a continuously variable transmission.

The six-speed automatic used in third-generation Mazda6 models has generally proven to be a solid unit when properly maintained. It also gives the car a more traditional driving feel than many CVT-equipped competitors.

Manual-transmission Mazda6 models can also be durable, although clutch life depends heavily on how the previous owner drove the car. A clutch that has spent most of its life in highway driving can last far longer than one repeatedly slipped in urban traffic.

On older automatic Mazda6 models, watch for delayed engagement, slipping, flaring between shifts, unusually hard shifts, or hesitation when moving from reverse to drive. Any of these symptoms deserve investigation before purchase.

For a long-term used-car purchase, I would generally be more comfortable with a well-maintained Mazda6 conventional automatic than with an otherwise comparable midsize sedan whose reputation is heavily dependent on a troublesome CVT.

What Are The Best Mazda6 Years to Buy?

The Mazda6 has several good used-car choices, but I would put the greatest emphasis on the third-generation cars. They combine a strong reliability record with modern safety features, good fuel economy, and fewer age-related concerns than the first two generations.

2016-2017 Mazda6: Excellent Overall Choices

The 2016 and 2017 Mazda6 are among my favorite years for a buyer primarily interested in long-term reliability. Both use the naturally aspirated 2.5-liter Skyactiv engine, and neither requires a turbocharger to deliver respectable performance.

By these years, Mazda had also had time to work through some of the normal early-production issues associated with the 2014 redesign. A well-maintained 2016 or 2017 Mazda6 can be an excellent combination of purchase price, reliability, fuel economy, and driving enjoyment.

2018-2020 Mazda6: Strong Later-Model Choices

The 2018 refresh brought a noticeably more upscale interior and additional features. These are also good years overall, although buyers need to pay more attention to the exact powertrain because the optional 2.5-liter turbo became available.

If reliability is the priority, I would favor a naturally aspirated 2018-2020 car. If performance matters more, the turbo is considerably quicker and can still be a reasonable choice with a strong maintenance history.

2012-2013 Mazda6: Good Budget Choices

For someone shopping at a much lower price point, a clean 2012 or 2013 Mazda6 with the 2.5-liter four-cylinder can still be worth considering. These cars lack the fuel economy and refinement of the third generation, but the basic drivetrain can be durable.

At this age, however, I would not buy one simply because it is a recommended year. Rust, maintenance history, accident repairs, oil leaks, and suspension condition should determine whether an individual car is worth owning.

Knowing which model years to concentrate on is step 1. Step 2 is knowing how to get a good used Mazda6 price.

Which Mazda6 Years Should You Avoid Or Approach With More Caution?

There is no single group of Mazda6 years that should automatically be rejected regardless of condition, but some deserve more scrutiny than others.

2003-2008 Mazda6

The first-generation Mazda6 is now old enough that corrosion and accumulated wear are the primary concerns. A rust-free, carefully maintained example can still provide inexpensive transportation, but a neglected one can quickly become a poor investment.

I would be especially cautious about cars with significant underbody corrosion, multiple fluid leaks, suspension noise, or evidence that maintenance has been deferred.

2009-2011 Mazda6

These are not necessarily bad cars, but I would usually choose a comparable 2012-2013 example if condition and price were similar. More importantly, I would often stretch to a 2014-or-newer Mazda6 if the budget allowed because the third generation represents a substantial overall improvement.

2014 Mazda6

The 2014 model was the first year of the completely redesigned third generation. It can still be a good used car, but when two examples are otherwise similar, I generally prefer a later third-generation model rather than the first year of a major redesign.

What Is the Most Reliable Mazda6 Generation?

The 2014-2021 third-generation Mazda6 is my choice for the best overall generation, particularly when equipped with the naturally aspirated 2.5-liter engine.

Within that generation, the 2016-2017 cars are especially attractive for buyers who value mechanical simplicity. The 2018-2020 models add refinement and features while still offering the naturally aspirated engine, although upper trims may have the turbocharged version.

If I were comparing a clean 2017 Mazda6 with 100,000 miles against a similarly priced 2014 Mazda6 with 75,000 miles, I would not automatically buy the lower-mileage car. I would put considerable weight on maintenance history and condition, and all else being equal I would favor the later car.

The same logic applies to a 2018 naturally aspirated Mazda6 versus a newer turbo model. The turbo may be faster and more desirable to an enthusiast, but the naturally aspirated car is the one I would choose if my primary objective were reaching 200,000 miles with the fewest potential powertrain expenses.

Major Mazda6 Problems and Expensive Repairs

Most Mazda6 problems are not catastrophic engine or transmission failures. That's one of the reasons the model can be an appealing used-car choice. Still, several issues deserve particular attention because they can either become expensive or help identify a poorly maintained car.

Rust and Structural Corrosion

Rust is one of the biggest concerns on older Mazda6 models. Surface rust is not unusual on an aging vehicle, but corrosion affecting structural areas, suspension mounting points, brake or fuel lines, or other critical components can turn an inexpensive car into one that isn't worth repairing.

This is especially important with first- and second-generation cars from areas that use road salt. An underbody inspection is far more useful than judging the car only by shiny exterior paint.

Engine Mount Failure and Excessive Vibration

Worn engine mounts are a relatively common age-related problem. Symptoms can include excessive vibration at idle, a noticeable thump when shifting between drive and reverse, or increased engine movement during acceleration.

A failed mount normally isn't a reason to abandon an otherwise good Mazda6, but multiple worn mounts can increase the repair bill.

Infotainment and Touchscreen Problems

Some third-generation Mazda vehicles have experienced infotainment problems, including screens that behave as though they are being touched without driver input. This is commonly described as "ghost touch."

Check the screen, controller, Bluetooth connection, navigation functions if equipped, and other infotainment features during a test drive. Electronic annoyances are easy to overlook when concentrating on how the car drives.

Suspension and Wheel-Bearing Wear

Clunks, humming noises, uneven tire wear, and loose or imprecise handling can indicate worn suspension components or wheel bearings. These become increasingly normal as a Mazda6 approaches higher mileage.

One worn component may be inexpensive enough to correct. A car that needs struts, control-arm components, bearings, tires, and an alignment at the same time can require a substantial amount of catch-up maintenance.

Turbocharged Engine Complexity

The later 2.5-liter turbo gives the Mazda6 substantially stronger acceleration, but the additional performance comes with additional hardware and greater mechanical complexity. That doesn't make every turbo Mazda6 troublesome, and a properly maintained example can be a very good car.

However, if two cars are otherwise comparable and my goal is minimum long-term repair exposure, I would choose the naturally aspirated 2.5-liter engine. On a turbo model, maintenance history becomes particularly important as mileage climbs.

Mazda6 Maintenance and Repair Costs

The Mazda6 is generally reasonable to maintain for a midsize sedan. Routine service is straightforward, and the naturally aspirated four-cylinder models do not require unusually exotic maintenance.

Actual repair prices vary considerably by location, labor rate, model year, and whether original-equipment or aftermarket parts are used, but these approximate ranges provide a useful idea of potential ownership costs:

A major advantage of buying a well-maintained Mazda6 is that expensive engine and transmission repairs are not something an owner should simply expect as routine maintenance. Preventive service and choosing a good individual car remain the best ways to keep ownership costs reasonable.

In addition, your trade-in allowance, if you are doing that, will also affect the overall potential cost analysis of moving into a Mazda6 (KBB versus Edmunds Appraisals - Which Is Better).

Mazda6 Maintenance After 100,000 Miles

A Mazda6 that has reached 100,000 miles can still have a substantial amount of useful life remaining, but this is the point where maintenance history becomes increasingly important.

• Engine oil: Continue regular oil and filter changes using the proper oil specification. Consistent oil service is particularly important on turbocharged models.
• Transmission: Check service history and fluid condition. Don't assume a transmission should be ignored simply because it is shifting normally today.
• Cooling system: Inspect coolant condition, hoses, connections, and signs of leakage.
• Spark plugs and ignition components: Verify that scheduled ignition maintenance has been completed.
• Belts and tensioners: Inspect for cracking, noise, looseness, or age-related deterioration.
• Suspension and steering: Higher-mileage cars commonly need attention to struts, bushings, links, bearings, or related components.
• Brakes and tires: Uneven tire wear can reveal alignment or suspension problems that are not immediately obvious during a short test drive.

At 150,000 miles and beyond, I would rather see a folder of maintenance receipts than a long list of optional equipment. Evidence that an owner consistently maintained the car is one of the strongest predictors of whether a high-mileage Mazda6 will remain dependable.

What to Check Before Buying a Used Mazda6

A pre-purchase inspection is worthwhile, but these Mazda6-specific areas deserve particular attention:

• Check carefully for rust: This is especially important on 2003-2013 cars from northern climates. Inspect underneath rather than judging only the exterior body panels.
• Test the automatic transmission: Look for delayed engagement, slipping, flaring, hesitation, or unusually harsh shifts.
• Check for vibration: Excessive vibration at idle or when shifting into gear may point to deteriorated engine mounts.
• Operate the infotainment system: On third-generation cars, make sure the screen and controls don't make selections or change functions without input.
• Listen to the suspension and wheel bearings: Clunks over bumps and humming that changes with road speed can reveal upcoming repairs.
• Scrutinize turbo maintenance: On later turbocharged models, look for consistent oil-change history and evidence that previous owners did not neglect maintenance.

Mazda6 Pros and Cons

Pros

• Above-average overall reliability
• Strong naturally aspirated 2.5-liter Skyactiv engine
• Conventional automatic transmission rather than a CVT
• Excellent steering and handling for a midsize sedan
• Good fuel economy, particularly on third-generation models
• Attractive styling that has aged well
• 200,000-mile service life is realistic with good maintenance

Cons

• Rust can be a serious concern on older examples
• Rear-seat and cargo space aren't class-leading
• Infotainment problems occur on some third-generation cars
• Turbo models add complexity and potential long-term expense
• Ride quality can feel firmer than some comfort-oriented rivals
• Older cars may require substantial suspension and age-related maintenance

Mazda6 vs. Its Main Rivals

The Mazda6 competes with some of the most successful midsize sedans ever sold. Which one is best depends partly on whether you prioritize maximum reliability, comfort, performance, or purchase price.

• Honda Accord: An excellent all-around alternative with strong reliability and more powertrain choices. The Mazda6 generally feels sportier, while the Accord often offers more passenger space.
• Toyota Camry: Usually the safer choice for a buyer whose only priority is proven long-term dependability and resale value. The Mazda6 is generally the more engaging car to drive.
• Hyundai Sonata: Often provides more features for the money, but reliability varies considerably by engine and year. I would generally be more comfortable buying a naturally aspirated third-generation Mazda6 for long-term ownership.
• Nissan Altima: Often competitively priced and comfortable, but the Mazda6's conventional automatic transmission gives it a meaningful long-term advantage over many CVT-equipped Altimas.

Which would I buy? If maximum statistical conservatism and resale value were my only priorities, the Camry would be difficult to beat. If I wanted a dependable midsize sedan that was also enjoyable to drive, a naturally aspirated 2016-2020 Mazda6 would be near the top of my list. That's where the Mazda6 makes its strongest case: it doesn't require giving up reliability to get a more engaging car.

Final Mazda6 Reliability Verdict

The Mazda6 is a good used car overall and one of the better midsize sedans for buyers who want both reliability and enjoyable driving dynamics. A properly maintained Mazda6 can reasonably reach about 200,000 miles, and exceptional examples can exceed 250,000 miles.

The strongest overall choices are the third-generation cars, particularly 2016-2020 models with the naturally aspirated 2.5-liter engine. They combine a durable engine, conventional automatic transmission, good fuel economy, modern safety equipment, and fewer age-related concerns than earlier generations.

Budget shoppers should not automatically dismiss the 2009-2013 Mazda6, especially a well-maintained four-cylinder example. But at this age, rust and previous maintenance are more important than finding a particular supposedly perfect year.

The later turbocharged Mazda6 is the choice for performance. The naturally aspirated 2.5-liter is the one I would choose for minimum complexity and maximum confidence as mileage approaches 150,000 or 200,000 miles.

Perhaps the Mazda6's biggest used-car advantage is that Mazda achieved competitive fuel economy without making the car dependent on a CVT. Combined with its durable naturally aspirated Skyactiv engine, that makes a carefully chosen Mazda6 an unusually appealing combination of reliability, efficiency, and driving enjoyment.

More On Mazda Model Reliability: If you may be looking at other Mazda models, visit our Mazda Reliability Guide to compare reliability, common problems, and the best years to buy across Mazda's most popular cars and SUVs.

Your Trade-In

It's good to always know the value of your trade-in while you're evaluating your next possible purchase. Here's a good source for a quick and accurate appraisal: free trade-in appraisal.