The 2005 Cadillac STS (Seville Touring Sedan) represented Cadillac's attempt to compete with European sport sedans. It's a four-door sedan, part of the second generation STS launched in 2005. Key trims included the base STS and the STS V8. Its popularity stemmed from its blend of American luxury with a sportier driving experience. The pricing ranged from approximately $40,000 to $50,000 when new, depending on the engine and options.
The Good
The 2005 Cadillac STS offered a blend of powerful engine options for performance enthusiasts and a comfortable, well-appointed interior for those seeking luxury. Its distinctive Cadillac design appealed to buyers wanting a stylish, recognizable car. For practical buyers, it provided a relatively spacious interior and decent fuel economy for its class. Value for the price compared to European rivals was another advantage.
The Bad
Potential weaknesses of the 2005 Cadillac STS include potential issues with the Northstar V8 engine, particularly head gasket failures. The electronic systems can also be prone to glitches. Rust can be a concern in regions with harsh winters. Furthermore, some find the interior materials and design less refined than competitors.
2005 Cadillac STS: Quick Overview
Here's a summary of key specs for the 2005 Cadillac STS:
- Engine Options:
- 3.6L V6: 255 horsepower
- 4.6L Northstar V8: 320 horsepower
- Horsepower:
- V6: 255 hp
- V8: 320 hp
- Fuel Economy:
- V6: 18 mpg city / 26 mpg highway (approximate)
- V8: 16 mpg city / 25 mpg highway (approximate)
- 0-60 Times:
- V6: Around 7.0 seconds
- V8: Around 6.0 seconds
- Towing Capacity: Not designed for towing. Towing capacity is minimal if any.
- Trim Level Features (Base STS):
- Leather upholstery
- Power driver and passenger seats
- Dual-zone climate control
- Bose premium audio system
- 17-inch alloy wheels
- Trim Level Features (STS V8):
- All base STS features
- 4.6L Northstar V8 engine
- Performance-tuned suspension
- Heated and ventilated front seats
- Wood trim accents
2005 Cadillac STS Specifications
Vehicle Information
| Year | 2005 |
| Make | Cadillac |
| Model | STS |
| Trim | - |
| Style | 4-Door Sedan V-8 |
| Type | Sedan |
| Category | Mid-Size Car |
Manufacturing Details
| Made In | United States |
| Manufacturing City | LANSING - GRAND RIVER |
Dimensions
| Doors | 4-Door |
| Curb Weight | 1796.22 kg |
| Gross Vehicle Weight Rating | - |
| Overall Height | 146.3 cm |
| Overall Length | 498.6 cm |
| Overall Width | 184.4 cm |
| Wheelbase Length | 295.66 cm |
| Standard Seating | 5 |
Engine & Performance
| Engine | 3.6-L V-6 DOHC 24V |
| Engine Size | 3.6L |
| Engine Cylinders | 6 |
| Transmission | 5-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 5-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Rack & Pinion |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $40,525 USD |
| Invoice Price | $37,486 USD |
| Delivery Charges | $695 USD |
Vehicle History Report
Vehicle
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Specifications
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Events
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Past Sale
Listings
Listings
Safety
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Recalls
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Market Price
Analysis
Analysis
What Problems Does the 2005 Cadillac STS Have?
Frequently reported problems with the 2005 Cadillac STS often revolve around the Northstar V8 engine. A common concern is head gasket failure, which can be expensive to repair. Symptoms include overheating, coolant loss, and white smoke from the exhaust. Electronic issues, such as problems with the navigation system, climate control, and other electronic components, are also frequently mentioned. Some owners have reported issues with the automatic transmission, experiencing rough shifting or outright failure.
Recalls for the 2005 STS were issued for various issues, including problems with the fuel system and electrical components. These recalls are documented by the NHTSA (National Highway Traffic Safety Administration). Long-term reliability concerns center around the longevity of the Northstar engine and the durability of electronic components. Early model years of the STS (2005-2007) seem to have a higher incidence of reported problems compared to later years. Regular maintenance, especially coolant flushes and transmission fluid changes, can help mitigate some of these issues.
Recalls for the 2005 STS were issued for various issues, including problems with the fuel system and electrical components. These recalls are documented by the NHTSA (National Highway Traffic Safety Administration). Long-term reliability concerns center around the longevity of the Northstar engine and the durability of electronic components. Early model years of the STS (2005-2007) seem to have a higher incidence of reported problems compared to later years. Regular maintenance, especially coolant flushes and transmission fluid changes, can help mitigate some of these issues.
How long will the 2005 Cadillac STS last?
With proper maintenance, a 2005 Cadillac STS can realistically reach 150,000 to 200,000 miles or provide 15-20 years of service. However, longevity is heavily dependent on diligent maintenance. Owners who consistently follow the recommended service schedule, especially regarding coolant flushes, oil changes, and transmission maintenance, will likely experience fewer issues. Long-term weaknesses typically include the aforementioned Northstar engine concerns, electronic glitches, and potential rust issues. Suspension components may also require attention as the car ages. Neglecting maintenance will significantly shorten its lifespan.
What Technology & Safety Features are Included?
The 2005 Cadillac STS offered a decent array of technology for its time. Standard features included a Bose premium audio system, dual-zone climate control, and OnStar. Optional features included a navigation system, sunroof, heated and ventilated front seats, and adaptive cruise control. The driver-assistance features were limited compared to modern vehicles, but included traction control and anti-lock brakes.
Safety features consisted of front and side airbags, as well as curtain airbags for both rows. The 2005 STS also had StabiliTrak, Cadillac's electronic stability control system. Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) generally show good performance in frontal and side impact tests. However, it's crucial to verify specific ratings for the 2005 model year on the NHTSA website, as ratings can vary. The IIHS (Insurance Institute for Highway Safety) ratings should also be consulted when available. The presence of adaptive cruise control and other tech features was a selling point when new, although these systems are less sophisticated than those found in newer cars.
Safety features consisted of front and side airbags, as well as curtain airbags for both rows. The 2005 STS also had StabiliTrak, Cadillac's electronic stability control system. Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) generally show good performance in frontal and side impact tests. However, it's crucial to verify specific ratings for the 2005 model year on the NHTSA website, as ratings can vary. The IIHS (Insurance Institute for Highway Safety) ratings should also be consulted when available. The presence of adaptive cruise control and other tech features was a selling point when new, although these systems are less sophisticated than those found in newer cars.
What Colors Options are Available?
Exterior Colors
Black Raven
Gold Mist
Infrared Red
Liquid Amethyst
Sterling Silver
White Diamond
Interior Colors
Light Cashmere
Dark Charcoal
2005 Cadillac STS Prices and Market Value
The 2005 Cadillac STS had a starting MSRP of around $40,000 to $50,000 when new, depending on the trim level and options. Current used market prices typically range from $3,000 to $8,000, depending on condition, mileage, and location. The STS has depreciated significantly due to its age, potential reliability concerns, and the availability of newer, more technologically advanced vehicles. Factors affecting resale value include the car's overall condition, maintenance history, mileage, and whether it's a V6 or V8 model. V8 models may command a slightly higher price, but maintenance records are key.
2005 Cadillac STS Cost of Ownership
The 2005 Cadillac STS can be relatively costly to own long-term. Insurance costs are moderate but can increase with the V8 model. Fuel economy is average for its class, but premium fuel is recommended for the V8. Maintenance and repair costs can be high, especially if head gasket issues arise or electronic components fail. Parts availability might become a concern. Budgeting for potential repairs is essential. It's not the most economical choice given its age and potential maintenance needs.
2005 Cadillac STS Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
64.35 liters
City Mileage
7.23 km/l
Highway Mileage
10.2 km/l
2005 Cadillac STS Safety Rating
NHTSA
IIHS
2005 Cadillac STS Recalls & Defects
Suspension:rear
Recall date
2006-04-20
Recall no.
06v125000
Source
NHTSA
Summary
Certain Vehicles Have A Left or Right Rear Suspension TOE Link That Could Separate Because OF AN Incorrect Weld.
Consequence
IF This Were TO Occur, THE Affected Rear Wheel Would BE Able TO Turn IN or Out, Affecting Vehicle Control, Which Could Result IN A Crash.
Remedy
Dealers Will Inspect THE Right and Left TOE Link and Replace AS Required. IF A TOE Link IS Replaced, THE Dealer Will Perform A Wheel Alignment. THE Recall Began ON MAY 3, 2006. Owners MAY Contact Cadillac AT 1-866-982-2339.
Notes
GM Recall NO. 06029. Customers MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Http://Www.safercar.gov.
Fuel System, Gasoline:delivery
Recall date
2006-01-25
Recall no.
06v020000
Source
NHTSA
Summary
Certain Vehicles Equipped With V6 Engines MAY Have A Condition Where Fuel IS NO Longer Supplied TO THE Engine. This Condition Occurs Without THE Illumination OF THE Fuel Level Low Indicator Light or THE Warning Chime.
Consequence
IF THE Engine Stops Running, THE Operator Will NOT BE Able TO Restart THE Vehicle Which Could Increase THE Risk OF A Crash.
Remedy
Dealers Will Reprogram THE Electronic Control Module (Ecm) With NEW Software Free OF Charge. Owners Were Notified IN December 2005 and Asked TO Maintain AT Least 1/4 OF A Tank Fuel Level TO Avoid This Condition Until THE Parts ARE Available. THE Parts ARE NOW Available, Owner Renotification Began ON March 23, 2006. Owners MAY Contact Cadillac AT 1-866-982-2339.
Notes
GM Recall NO. 05111.customers MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Http://Www.safercar.gov.
Power Train:axle Assembly:axle Shaft:seal
Recall date
2007-12-20
Recall no.
07v589000
Source
NHTSA
Summary
ON Certain Passenger Vehicles, THE Rear Axle Pinion Seal Does NOT Meet All OF THE Specifications and MAY Experience A Fluid Leak.
Consequence
A Rear Differential Failure MAY Cause Loss OF Motive Power and Possibly Loss OF Control Increasing THE Risk OF A Crash.
Remedy
Dealers Will Replace THE Pinion Seal Free OF Charge. THE Recall Began ON February 1, 2008. Owners MAY Contact Cadillac AT 1-800-458-8006 or Http://Www.cadillac.com; Pontiac AT 1-800-620-7668 or Http://www.pontiac.com; and Saturn AT 1-800-972-8876 or Http://www.saturn.com.
Notes
GM Recall NO. 07204.customers MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Http://Www.safercar.gov.
2005 Cadillac STS Warranty
Basic
Original warranty
48 months / 50,000 miles
Estimated remaining
Expired
Powertrain
Original warranty
48 months / 50,000 miles
Estimated remaining
Expired
Rust
Original warranty
72 months / 100,000 miles
Estimated remaining
Expired
2005 Cadillac STS Insurance
Insurance for a 2005 Cadillac STS is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2005 Cadillac STS Compare to Other Sedan?
The 2005 Cadillac STS competed with luxury sport sedans like the BMW 5 Series, Mercedes-Benz E-Class, and Acura TL. In terms of performance, the STS V8 could hold its own, but the BMW and Mercedes often offered superior handling and driving dynamics. The STS offered comparable features, but its interior materials and design weren't always considered as refined as its German rivals. Reliability was a significant weakness for the STS, particularly regarding the Northstar engine, while the German cars and Acura TL were generally more dependable.
In terms of price, the STS was often more affordable than the BMW and Mercedes when new, but the used market reflects its depreciation and reliability concerns. The Acura TL offers similar luxury and performance with greater reliability and lower running costs. As an alternative, consider a Lexus GS from the same era for a blend of luxury and dependability. If reliability is a primary concern, the Acura TL or Lexus GS are better choices. If driving dynamics and brand prestige are paramount, the BMW 5 Series or Mercedes E-Class (with careful pre-purchase inspection) might be worth considering.
In terms of price, the STS was often more affordable than the BMW and Mercedes when new, but the used market reflects its depreciation and reliability concerns. The Acura TL offers similar luxury and performance with greater reliability and lower running costs. As an alternative, consider a Lexus GS from the same era for a blend of luxury and dependability. If reliability is a primary concern, the Acura TL or Lexus GS are better choices. If driving dynamics and brand prestige are paramount, the BMW 5 Series or Mercedes E-Class (with careful pre-purchase inspection) might be worth considering.
Ranks #1940 Sedan
| 1 | 2023 Toyota Camry | (5.0★) |
| 2 | 2023 Honda Accord | (0.0★) |
| 3 | 2023 Lexus ES | (0.0★) |
| 4 | 2024 Subaru Legacy | (5.0★) |
| 5 | 2022 Mazda MX-30 | (4.0★) |
| 6 | 2024 BMW M3 | (0.0★) |
| 7 | 2023 Ford Mustang | (5.0★) |
| 8 | 2023 Mercedes-Benz AMG GT | (0.0★) |
| 9 | 2023 Audi A3 | (0.0★) |
| 10 | 2023 Chevrolet Camaro | (5.0★) |
| 11 | 2023 Hyundai Elantra Hybrid | (0.0★) |
| 12 | 2023 Nissan Altima | (4.0★) |
| 1940 | 2005 Cadillac STS | (0.0★) |
Final Verdict: Is the 2005 Cadillac STS a Good Sedan?
The 2005 Cadillac STS is ideal for someone who appreciates Cadillac styling and wants a relatively affordable luxury sedan, but is prepared for potential maintenance costs. It's worth buying *used* only if it has been meticulously maintained and has detailed service records. Look for a well-cared-for V6 model as they tend to be more reliable than the V8. A pre-purchase inspection by a qualified mechanic is essential, focusing on engine health and potential electronic issues. If you're not prepared for potential repairs and higher running costs, there are more reliable alternatives in the same price range. Buying one with low mileage and verifiable service history is key to a positive ownership experience.
Jovan
Jovan specializes in interpreting vehicle records and making sense of VIN data. With over 10 years of experience in the automotive data industry, his work ensures that every report is clear, accurate, and useful for car buyers.