2004 Mazda Mazda6 Reliability ReportKeepScore 78/100 · top failure points · buy or avoid
Quick Facts · 2004 Mazda Mazda6
- Outscores the 2006 Mazda Mazda6 by 6 points — one of the stronger nearby years to consider.
- The system most likely to surface first: automatic transmission (major severity).
- Has 7 NHTSA recalls on record — the most notable involves the air bags:frontal:passenger side:inflator module.
2004 Mazda Mazda6: Buy or Avoid?
The 2004 Mazda6 offers a spirited driving experience but comes with several well-documented weak points, primarily the automatic transmission and significant rust potential. While the engines are generally robust with proper care, neglecting maintenance or overlooking common issues can quickly lead to costly repairs, making diligent pre-purchase inspection crucial.
The 2004 Mazda6 can be an enjoyable and stylish sedan, but its known issues with automatic transmissions and severe rust require a cautious approach. If you find a well-maintained manual transmission model, particularly one from a dry climate, and conduct a thorough inspection, it can still be a good buy. Otherwise,…
Best Model Years
2006-2008 (later models improved automatic transmissions, but rust remains a concern)
Years to Avoid
2003-2005 (early automatic transmission and severe rust issues are most prevalent)
Biggest Strengths
- Engaging driving dynamics for its class
- Generally robust manual transmissions
- Stylish and functional interior design
2004 Mazda Mazda6 — Known Trouble Spots
The systems that tend to fail first on the 2004 Mazda Mazda6, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
The 4-speed automatic paired with the 2.3L engine is prone to rough shifts, slipping, and complete failure due to faulty solenoids or internal wear, particularly if fluid changes were neglected. The 5-speed auto (V6, later I4) is better…
Mazda vehicles from this era, especially the Mazda6, are highly susceptible to significant rust on rocker panels, rear wheel arches, subframes, and suspension components, particularly in areas exposed to road salt. This can lead to struc…
Common electrical problems include failing window regulators, non-functional dashboard lights, issues with the HVAC controls, and occasional airbag warning lights. These can be frustrating and difficult to diagnose.
2004 Mazda Mazda6 Mileage Danger Zones
The mileage windows when the 2004 Mazda Mazda6 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the Mazda6 should be performing optimally, assuming routine fluid changes and inspections have been completed. Any issues at this stage are likely isolated or warranty-related.
Maintenance Zone
This mileage often marks the onset of expected wear items. Transmission issues (especially 4-speed auto) can begin to surface, along with some suspension components. Rust may start to appear superficially.
Elevated Risk Zone
Many key components may be nearing the end of their service life. Watch for engine timing issues (2.3L), more severe transmission problems, and accelerated rust. Electrical issues tend to multiply here.
High Risk Zone
Expect significant age-related failures and increased maintenance. A comprehensive inspection is vital. Major component failures (engine, transmission) are a real possibility if maintenance has been deferred.
2004 Mazda Mazda6 Ownership Cost Outlook
What it typically costs to keep the 2004 Mazda Mazda6 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$450-700
Moderate Repairs
$600-1,800 occasionally (e.g., control arms, VVT repair)
How Long Does the 2004 Mazda Mazda6 Last?
Aim for a vehicle with under 100,000 miles, as beyond that, the risk of major engine or transmission work increases significantly, especially for automatic models.
What 2004 Mazda Mazda6 Owners Actually Say
What Owners Love
- Engaging and sporty driving dynamics, often praised as the 'driver's car' of its class.
- Comfortable and supportive seats, even on long drives.
- Attractive interior and exterior styling that holds up well over time.
- Relatively good fuel economy for its performance, especially with the I4 engine.
Common Frustrations
- Frustrating and expensive automatic transmission failures (especially 4-speed).
- Significant rust issues that diminish appearance and structural integrity.
- Small rear seat legroom compared to some competitors.
- Interior plastics can rattle or become sticky with age.
Who Should Buy the 2004 Mazda Mazda6?
Best For
- Enthusiasts seeking a fun-to-drive sedan on a budget (especially manual models)
- Someone willing to invest in proactive rust prevention and maintenance
- Drivers who appreciate good handling over ultimate luxury
Not Ideal For
- Buyers seeking absolute, trouble-free reliability like a Toyota Camry
- Those living in rust-prone regions unwilling to invest in rust protection
How the 2004 Mazda Mazda6 Compares to Rivals
The Mazda6 offered a more engaging driving experience than many rivals but sacrificed some of the bulletproof reliability found in the segment leaders like the Accord and Camry, particularly regarding rust and automatic transmission durability.
More Reliable Than
- Chevrolet Malibu (same era)
- Nissan Altima (earlier 2000s, CVT issues)
Comparable To
- Ford Fusion (early models)
- Hyundai Sonata (early 2000s)
Safety Recalls on the 2004 Mazda Mazda6
7 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Mazda North America Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2006-2007 Mazdaspeed6 and 2004 MPV vehicles nationwide. Mazda is also recalling 2005-2006 MPV vehicles in Alabama, Arizona, Arkansas, California, Delaware, the District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands. On July 9, 2019 this recall was expanded to include certain 2004-2011 RX-8 vehicles that were previously recalled under 16V-354 but have not yet been repaired. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these passenger air bag inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Mazda North American Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2004-2005 MPV, 2004 RX-8, and 2006-2007 Mazdaspeed6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
What breaks on the 2004 Mazda Mazda6?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Mazda Mazda6 — Year-by-Year Comparison
Compare KeepScores across nearby years of the Mazda Mazda6. Click any year for its full report.
Competing 2004s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2004 Mazda Mazda6
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Frequently Asked Questions
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