Is the 2004 Cadillac CTS reliable?

Reliability is generally average for its age and class; a well-maintained CTS can be dependable, but neglected oil changes and deferred repairs can lead to expensive issues, especially on certain V6 configurations.

What are the most common 2004 Cadillac CTS problems?

Common issues include timing chain wear (notably on some 3.6L V6 models), cooling system leaks/thermostat problems, electrical glitches like window regulators, and front suspension wear items.

Are maintenance costs high on a 2004 CTS?

Costs are usually moderate-to-high compared with mainstream sedans because parts, diagnostics, and labor can add up, especially for engine timing-related work and electrical troubleshooting.

What are the best years of the first-generation Cadillac CTS to buy?

Later first-gen years are often preferred due to running improvements; however, the best choice is usually the CTS with the strongest service records, consistent oil changes, and proof of major repairs already addressed.

What should I check before buying a used 2004 Cadillac CTS?

Verify maintenance history, scan for engine codes, check for coolant leaks/overheating signs, test all electronics (windows, locks, dash lights), and listen for suspension clunks during a test drive. For deeper ownership confidence, get a complete owner’s guide with full specs, fluid capacities, recommended service intervals, and model-specific maintenance schedules for the 2004 Cadillac CTS.

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Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

2004 Cadillac CTS Reliability ReportCommon Problems, Repair Costs & Expert Verdict

72/ 100

KeepScore

MODERATE RISK

Grade: C-

A stylish sedan with a driving personality, but its electrical and cooling system weaknesses demand a proactive owner.

Full system breakdown + what I would do

Quick Facts · 2004 Cadillac CTS

Has 6 NHTSA recalls on record — the most notable involves the fuel system, gasoline:delivery:fuel pump.
Scores 6 points below the strongest nearby year — the 2006 Cadillac CTS earns a 78.
The system most likely to surface first: electrical system (moderate severity).

Should You Buy the 2004 Cadillac CTS?

The 2004 Cadillac CTS represents a bold styling statement and a compelling value in the used luxury market, but it comes with a significant caveat: be prepared for persistent electrical gremlins and cooling system issues. If you prioritize styling and a comfortable ride over bulletproof reliability and are ready for consistent maintenance, this could be an option; otherwise, proceed with considerable caution.

Biggest Strengths

Strong V6 engine performance (especially the 3.6L)
Comfortable, composed ride quality
Distinctive, appealing exterior styling

Top Risk Areas

The systems that break first on the 2004 Cadillac CTS. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Electrical Systemmoderate

Cooling Systemmajor

Interior Componentsminor

Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

NHTSA Recalls

6 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

General Motors LLC (GM) is recalling certain model year 2004-2007 Cadillac CTS-V vehicles manufactured October 6, 2003, to March 15, 2007, and 2006-2007 Cadillac STS-V vehicles manufactured June 23, 2005, to March 15, 2007. In the affected vehicles, the electrical terminals of the fuel pump module may overheat resulting in the melting of the flange material.

ELECTRICAL SYSTEM:IGNITION

This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring. General Motors LLC (GM) notified the agency on July 2, 2014 that they are recalling 554,328 model year 2003-2014 Cadillac CTS vehicles manufactured August 16, 2001, to April 28, 2014, and 2004-2006 Cadillac SRX vehicles manufactured March 20, 2003, to August 11, 2006. In these models, the weight on the key ring and/or road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.

What breaks on the 2004 Cadillac CTS?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Cadillac CTS by Year

Compare KeepScores across nearby years of the Cadillac CTS. Click any year for its full report.

All Cadillac CTS years ranked →Cadillac CTS years to avoid →Cadillac CTS common problems →

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