2004 Buick Regal Reliability ReportB+ grade · low risk · system-by-system breakdown
Quick Facts · 2004 Buick Regal
- The system most likely to surface first: engine gaskets (major severity).
- Has 4 NHTSA recalls on record — the most notable involves the engine and engine cooling:engine.
- Outscores the 2002 Buick Regal by 6 points — one of the stronger nearby years to consider.
Is the 2004 Buick Regal Worth Buying?
The 2004 Buick Regal, especially with the venerable 3.8L V6 engine, is one of the safest used sedans you can buy if you prioritize comfort and value. Its robust mechanicals offer impressive longevity, though attention to a few specific known weaknesses is crucial for long-term satisfaction. This car represents a smart investment for a comfortable, low-cost daily driver.
The 2004 Buick Regal is a smart buy for those seeking a comfortable, reliable, and affordable used sedan. Its legendary 3.8L V6 engine and plush ride make it an excellent value, but you must be diligent about addressing its well-known intake manifold gasket and transmission solenoid issues. A thorough pre-purchase i…
Best Model Years
2000-2004 (These final W-body generation years benefited from refinements and are generally the most reliable).
Years to Avoid
Earlier years of the 1997-2004 generation (e.g., 1997-1999) before some powertrain and electrical refinements were fully implemented.
Biggest Strengths
- Legendary 3.8L Series II V6 engine durability
- Comfortable, quiet ride quality
- Abundant and affordable parts availability
What Tends to Fail First on the 2004 Buick Regal
The systems that tend to fail first on the 2004 Buick Regal, 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 upper and lower intake manifold gaskets on the 3.8L V6 engines are prone to failure, leading to coolant leaks, often externally but sometimes internally, mixing with oil or contaminating spark plugs. This can cause overheating, misfi…
The 4T65-E automatic transmission can develop issues with its shift solenoids (A/B) or pressure control solenoid (PCS). This manifests as harsh shifts, slipping, or delayed engagement, particularly noticeable between 1st and 2nd gear or…
Various electrical components can fail, including the Body Control Module (BCM) which is susceptible to corrosion, causing intermittent issues with lights, gauges, or accessories. Window regulators are also common failure points, as are…
2004 Buick Regal Mileage Danger Zones
The mileage windows when the 2004 Buick Regal most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
This period typically involves routine maintenance like oil changes and tire rotations. The vehicle is still in its prime, with minimal risk of major component failures.
Maintenance Zone
Beyond initial wear items, this mileage often requires spark plug replacement, brake service, and potentially the first major transmission fluid service. Keep an eye out for early signs of intake manifold gasket issues.
Elevated Risk Zone
This is where the known weaknesses of the Regal often start to appear. Intake manifold gaskets are a significant concern, as are potential transmission solenoid issues and more pervasive suspension wear.
High Risk Zone
At this mileage, expect more significant repairs. Transmission overhaul becomes a possibility, and accumulated wear and tear across various systems will likely require attention. Rust in salt-belt areas becomes more pronounced.
2004 Buick Regal Ownership Cost Outlook
What it typically costs to keep the 2004 Buick Regal 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 (e.g., intake gaskets, transmission solenoids, suspension components)
How Long Does the 2004 Buick Regal Last?
While the 3.8L engine can easily exceed 200,000 miles, focus on preventative maintenance, particularly around the 90,000-120,000 mile mark, to pre-empt major issues and maximize its lifespan.
What 2004 Buick Regal Owners Actually Say
What Owners Love
- Exceptional ride comfort that smooths out rough roads, feeling like a much more expensive car.
- Powerful and reliable 3.8L V6 engine (especially the supercharged GS), offering strong acceleration.
- Spacious interior and large trunk, making it practical for families or long trips.
- Very affordable parts and maintenance, making it cheap to own and repair.
Common Frustrations
- Dated interior design and materials feel old-fashioned compared to newer cars.
- Numb steering and soft suspension limit driving engagement; not a 'driver's car'.
- Can suffer from various electrical quirks (windows, HVAC, gauges) that are annoying to diagnose.
- Fuel economy is only average for a sedan of its size and power.
Who Should Buy the 2004 Buick Regal?
Best For
- Budget-conscious buyers seeking maximum comfort for their dollar
- Commuters who prioritize a smooth, quiet ride over sporty handling
- Individuals who perform basic DIY maintenance
Not Ideal For
- Performance enthusiasts (unless specifically a well-maintained GS model)
- Drivers seeking modern technology and infotainment
How the 2004 Buick Regal Compares to Rivals
The Regal stands out for its superior ride comfort and powerful 3.8L V6 compared to many domestic rivals, often offering better value than imports, though it can't quite match the bulletproof reliability record of the top Japanese sedans.
More Reliable Than
- Ford Taurus (earlier generations with problematic transmissions)
- Chrysler Sebring / Dodge Stratus
- Older domestic sedans with less reliable V6 engines
Comparable To
- Chevrolet Impala (same W-body platform, similar powertrain)
- Pontiac Grand Prix (same W-body platform)
- Toyota Avalon (for ride comfort, not reliability)
2004 Buick Regal Recall History
4 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ENGINE AND ENGINE COOLING:ENGINE
General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V-118, 09V-116, and 15V-201 to address the possibility that engine oil may drip onto the hot exhaust manifold.
ENGINE AND ENGINE COOLING:ENGINE
General Motors LLC (GM) notified the agency on April 2, 2015, that they are is recalling certain model year 2004 Buick Regal vehicles manufactured April 9, 2003, to June 1, 2003, 2004 Chevrolet Impala vehicles manufactured April 8, 2003, to June 23, 2003, and 2004 Chevrolet Monte Carlo vehicles manufactured April 7, 2003, to June 23, 2003. On May 18, 2015, GM expanded the recall to cover an additional 49,751 2004 Pontiac Grand Prix vehicles manufactured January 6, 2003, to June 25, 2004. In the affected vehicles, the valve cover gasket may leak.
What breaks on the 2004 Buick Regal?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Other Buick Regal Years to Consider
Compare KeepScores across nearby years of the Buick Regal. Click any year for its full report.
2004 Buick Regal Alternatives
Similar class, similar year range — ranked by KeepScore.
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Frequently Asked Questions
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