2004 Subaru Impreza Reliability ReportCommon Problems, Repair Costs & Expert Verdict
Quick Facts · 2004 Subaru Impreza
- Has 8 NHTSA recalls on record — the most notable involves the air bags:frontal:passenger side:inflator module.
- Outscores the 2005 Subaru Impreza by 8 points — one of the stronger nearby years to consider.
- The system most likely to surface first: engine head gaskets (2.5l na) (major severity).
Should You Buy the 2004 Subaru Impreza?
The 2004 Subaru Impreza is a fun-to-drive compact with exceptional all-wheel-drive capability, appealing to enthusiasts and those in challenging climates. However, pervasive head gasket issues on the 2.5L naturally aspirated engine and a high propensity for rust demand significant buyer vigilance and a dedicated maintenance budget. Proceed with caution, as neglect can lead to expensive, critical failures.
The 2004 Subaru Impreza is a compelling choice for its robust AWD and engaging driving dynamics, making it a fantastic companion for snowy climates or spirited driving. However, the pervasive head gasket issues on the 2.5L naturally aspirated engine and the significant risk of chassis rust necessitate a highly cauti…
Best Model Years
For the GD chassis, 2006-2007 WRX/STI are generally considered more refined. For NA models, later 2005-2007 models might have slightly improved head gaskets but still warrant inspection.
Years to Avoid
No specific years to outright avoid in this generation, but any 2.5L NA engine without documented head gasket replacement history should be approached with extreme caution. Pre-2000 models often have worse rust.
Biggest Strengths
- Excellent All-Wheel-Drive (AWD) capability
- Engaging driving dynamics and handling
- Robust manual transmissions (especially WRX)
Top Risk Areas
The systems that tend to fail first on the 2004 Subaru Impreza, 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 naturally aspirated 2.5L SOHC engine is notorious for external and internal head gasket leaks, leading to coolant loss, oil contamination, overheating, and potential catastrophic engine failure. This is often due to inferior original…
The chassis is highly susceptible to rust, particularly in salt-belt regions. Common areas include rear wheel arches, rocker panels, subframes, brake lines, fuel lines, and strut towers. This can compromise structural integrity and safety.
Wear items like wheel bearings, control arm bushings, and strut mounts tend to fail sooner than average due to the vehicle's weight and potentially spirited driving. Power steering pump leaks are also common.
2004 Subaru Impreza Mileage Danger Zones
The mileage windows when the 2004 Subaru Impreza most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the vehicle should be in excellent mechanical condition, requiring only routine maintenance like oil changes, tire rotations, and cabin air filter replacements. This is an ideal time for an initial detailed inspection.
Maintenance Zone
This mileage often triggers major service intervals including spark plugs, differential fluids, and a more thorough inspection of wear items. For 2.5L NA engines, vigilance for early head gasket weepage begins.
Elevated Risk Zone
This is a critical interval for the 2.5L NA engine as the timing belt and water pump are due, and head gasket failures become highly prevalent. Suspension components and power steering systems also show significant wear.
High Risk Zone
Beyond this point, the likelihood of major engine work (especially head gaskets if not already done) dramatically increases. Rust issues can become severe, impacting safety components, and transmission wear in automatic models may surface.
2004 Subaru Impreza Ownership Cost Outlook
What it typically costs to keep the 2004 Subaru Impreza on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$400-600
Moderate Repairs
$500-1,500 occasionally
How Long Does the 2004 Subaru Impreza Last?
Higher mileage examples (100k+) can still be good buys if there's solid documentation of head gasket replacement, timing belt service, and diligent rust prevention or repair. For any mileage, a pre-purchase inspection is non-negotiable.
What 2004 Subaru Impreza Owners Actually Say
What Owners Love
- Exceptional all-weather capability and grip from AWD
- Engaging and fun-to-drive handling characteristics
- Strong sense of community and plentiful aftermarket support
- Distinctive styling and rally heritage appeal
Common Frustrations
- Relatively poor fuel economy for its class
- Noticeable road noise at highway speeds
- Dated interior quality and materials showing wear
- High potential for expensive engine and rust repairs
Who Should Buy the 2004 Subaru Impreza?
Best For
- Enthusiasts who appreciate a spirited driving experience and rally heritage
- Drivers in snowy or challenging weather climates needing reliable AWD
- Individuals willing to perform DIY maintenance or invest in professional Subaru-specific service
Not Ideal For
- Budget-constrained buyers without a repair fund
- Individuals seeking absolute 'set it and forget it' reliability (like a Corolla)
How the 2004 Subaru Impreza Compares to Rivals
The Impreza carves out a unique niche with its standard AWD and rally-inspired performance. While not as bulletproof as some Japanese rivals in terms of engine longevity, its driving experience and capability in adverse weather are unmatched in its class.
More Reliable Than
- 2004 Volkswagen Jetta (complex electrical, higher maintenance)
- 2004 Ford Focus (less engaging drive, inferior AWD)
- 2004 Mitsubishi Lancer (less refined, less robust AWD)
Comparable To
- 2004 Mazda 3 (similar driving dynamics, but FWD biased)
- 2004 Nissan Sentra SE-R (sporty, but FWD, less rugged)
NHTSA Recalls
8 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2006 Saab 9-2X vehicles originally sold, or ever registered, in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B." 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.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicles originally sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C." 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 Subaru Impreza?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Subaru Impreza by Year
Compare KeepScores across nearby years of the Subaru Impreza. Click any year for its full report.
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