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Cadillac STS: engines, features and what to know when buying
Cadillac STS — a luxurious rear-wheel-drive sedan produced from 2004 to 2011. In this article, we review its engines, features and what to check before buying a used car.
STS in brief
The STS was Cadillac's luxury sedan aimed at competing with European mid-size and upper-class cars. It was built on a rear-wheel-drive platform, with some versions offering all-wheel drive.
Besides the standard version, there was also the sporty STS-V.
Which version to choose
The STS was produced in one generation with a refresh around 2008. The choice mainly depends on the engine, equipment and condition.
If comfort and economy are most important, the V6 is suitable. The V8 offers livelier dynamics, while the STS-V is for driving enthusiasts.
Engines and transmissions
The most common engines are the 3.6-litre V6 and 4.6-litre 'Northstar' V8 petrol units. The STS-V featured a supercharged 4.4-litre V8 with significantly more power.
The transmission is automatic. Rear-wheel or all-wheel drive is offered.
What to check when buying a used STS
The V8 'Northstar' engines are known for potential head gasket and cooling system issues, so check for coolant leaks and engine overheating.
Test the suspension, automatic transmission and electronics. Ensure everything works — air conditioning, seats, multimedia.
If the car was imported from abroad, check its history, mileage and accident records. Parts availability in Europe may be limited.
Trims
Names and equipment vary by market and year; we list the most commonly found versions in Europe.
STS 3,6 V6
2004–2011Most common version with a V6 engine.
- 3.6-litre V6 petrol engine
- Rear-wheel drive, some with all-wheel drive
- Often — leather interior
STS 4,6 V8
2004–2011More powerful version with a V8 engine.
- 4.6-litre "Northstar" V8 petrol engine
- More lively dynamics
- Often — more equipment
STS-V
2006–2009Sporty version with a turbocharged V8.
- 4.4-litre turbocharged V8 engine
- Sportier suspension and brakes
- Distinctive styling
Version comparison
| STS 3,6 V6 | STS 4,6 V8 | STS-V | |
|---|---|---|---|
| Who it's for | For comfortable cruising | For a livelier drive | For sporty driving |
| Engine | 3.6 l V6 | 4.6 l V8 | 4.4 l supercharged V8 |
| Price in the used market (relatively) | € | €€ | €€€ |
The V6 version will suit most buyers. Opt for the V8 or STS-V only if you're prepared for higher maintenance costs.
Pros
- A comfortable luxurious interior
- Rear-wheel drive and good handling
- Powerful V8 engine options
- Affordable pricing in the used market
Cons
- Potential issues with the Northstar V8
- Limited parts availability and service options in Europe
- High fuel consumption
Frequently asked questions
What engines were available in the STS?
3.6-litre V6 and 4.6-litre V8 petrol engines, with the STS-V featuring a 4.4-litre supercharged V8.
Does the STS have rear-wheel drive?
Yes, and some versions came with all-wheel drive.
What is the STS-V?
It's the sporty version of the STS with a supercharged V8 engine.
Updated 2026-10-19 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
