2004 Cadillac Seville Problems: 2 Known Issues
2004 model year · 170+ owner reports · Updated November 2026
According to Au7o's analysis of 170+ owner reports, the 2004 Cadillac Seville has 2 documented known issues, with 1 rated critical. The most serious is Northstar 4.6L Head Gasket Failure ($2,500-$4,000 repair). The most commonly reported issue is Magnetic Ride Control Shock Absorber Failure with 170 owner reports. Across all issues with published estimates, repair costs range from $400 to $4,000. DIY maintenance guides at au7o.io.
2004 · All trims · All engines
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All 2 Known Issues
NHTSA Recalls5 recalls
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
ON CERTAIN CADILLAC DEVILLE AND SEVILLE PASSENGER VEHICLES, FUNERAL COACHES, AND LIMOUSINES EQUIPPED WITH A V8 (4.6L) ENGINE, OLDSMOBILE AURORA PASSENGER VEHICLES EQUIPPED WITH A V8 (4.0L ) ENGINE, AND PONTIAC BONNEVILLE SSEI PASSENGER VEHICLES EQUIPPED WITH A SUPERCHARGED V6 (3.8L) ENGINE, THE FUEL TANK PRESSURE SENSORS ARE UNUSUALLY SUSCEPTIBLE TO MALFUNCTIONS. IF THE SENSOR MALFUNCTIONS, EXCESSIVE VACUUM CAN BE APPLIED DURING SELF-DIAGNOSTIC TESTING.
STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
CERTAIN PASSENGER VEHICLES WERE BUILT WITH MISSING OR UNDER-TORQUED STEERING GEAR ATTACHMENT BOLTS. IF A BOLT IS MISSING, THE DRIVER MAY NOTICE UNEVEN STEERING RESPONSE OR UNUSUAL NOISES DURING TURNS.
EQUIPMENT:OTHER:LABELS
VEHICLE DESCRIPTION: CERTAIN PASSENGER VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES HAVE AN INCORRECT TIRE PRESSURE LABEL. ON VEHICLES EQUIPPED WITH P235/55R17 TIRES, THE TIRE PRESSURE LABEL INCORRECTLY SPECIFIES P235/60ZR16 TIRES.
STEERING:LINKAGES:TIE ROD ASSEMBLY
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE INNER TIE ROD NUTS ARE LOOSE AND CAN RESULT IN SEPARATION OF A TIE ROD.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS
VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THESE VEHICLES HAVE INTERNAL FLUID LEAKS IN THE BRAKE HYDRAULIC CONTROL UNIT.
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Frequently Asked Questions
What are the most common Cadillac Seville problems?
According to Au7o's analysis of 170+ owner reports, the 2004 Cadillac Seville has 2 documented issues. The most frequently reported are: Northstar 4.6L Head Gasket Failure, Magnetic Ride Control Shock Absorber Failure. Of these, 1 is rated critical and should be addressed promptly.
Is the Cadillac Seville reliable?
The 2004 Cadillac Seville has 2 known issues documented across 170+ owner reports. 1 issue is rated critical: Northstar 4.6L Head Gasket Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Cadillac Seville problems?
Repair costs for known Cadillac Seville issues range from $400 to $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Northstar 4.6L Head Gasket Failure, typically costs $2,500-$4,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 1993-2004 Cadillac Seville Northstar 4.6L Head Gasket Failure?
The Northstar V8 in the Seville shares the same head gasket failure as all Northstar-equipped vehicles. The aluminum block head bolt threads strip, reducing clamping force on the head gaskets. This allows combustion gases to enter the cooling system and coolant to enter the cylin… Repairs typically run $2,500-$4,000. Severity: high.
What is the 2002-2004 Cadillac Seville Magnetic Ride Control Shock Absorber Failure?
The Seville STS with Magnetic Ride Control (MRC) uses magnetorheological fluid-filled shocks that are expensive to replace and prone to fluid leaks. When a shock fails, the system defaults to a harsh ride and displays a service message. Repairs typically run $400-$1,500. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.