Overview & Reviews

Though it evolved into an entirely different species, the luxury performance DNA of the Cadillac STS can be traced all the way back to the special range-topping Seville hardtop coupe of the 1950s. At that time one of the fastest, flashiest and most luxurious cars on the road, it evolved into various different forms over the course of several decades until emerging as the buttoned-down STS luxury sedan.

If you're in the market for a used luxury sedan with competitive amounts of power, roominess, comfort and value, a STS could be a good idea. However, it was largely eclipsed in terms of performance and luxury by competing Japanese and European sedans in its later years. Even its smaller CTS sibling offered better performance and handling, a much nicer interior and class-competitive interior space.

Most Recent Cadillac STS
The Cadillac STS was a rear-wheel-drive luxury sedan that was produced from 2005 through 2011. A midcycle refresh took place for '08, bringing revised styling, a more luxuriously trimmed interior and a new base engine. We suggest focusing your search on cars from these later model years.

Originally, the STS came standard with a 255-horsepower 3.6-liter V6 and a five-speed automatic. This was replaced by a 302-hp V6 and six-speed auto for 2008. With the exception of the STS's final model year in 2011, buyers could opt for a 320-hp 4.6-liter V8 coupled to a six-speed auto. Originally, each engine represented a different trim level, as the V8 came standard with the V6's optional heated front and rear seats, memory functions, heated steering wheel and automatic wipers. Key options to look for included a magnetically controlled adaptive suspension, adaptive cruise control, a navigation system and ventilated front seats.

For 2010 and 2011, however, trim levels were introduced. The V6 came in Luxury Sport, Luxury and Premium trims, while the V8 was available in Luxury and Performance. The actual equipment that was available didn't really change. Many of the previous options were simply redistributed into the upper trims, though it should be noted that all but the V6 Luxury trims got upgraded braking, steering and cooling systems.

In reviews and road tests, our editors found the strengths of the Cadillac STS to include surprising agility, respectable performance and a high-quality audio system. Downsides include a somewhat old-fashioned feel compared to its rivals, a small trunk and hit-or-miss interior quality. Overall, it's hard to fully endorse this full-size luxury sedan when Cadillac's own smaller CTS from the time offered a more involving drive while only giving up a bit of interior space to its big brother.

Previous Cadillac STS Models
Used shoppers may come across an older STS. Technically a trim level (there was also an SLS), this is actually the front-wheel-drive, fifth-generation Seville produced from 1998-2003. The STS was the "performance-oriented version" of that car and featured a more powerful V8 engine along with more luxury features. The 1992-'97 Seville also featured a similar STS edition.

User Reviews:

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  My 10th Cadillac - 2005 Cadillac STS
  By 2005 Cadillac STS - March 22 - 12:12 am

  I have been through them all and find this car to be the most disappointing of all. I miss the auto brake release, the fuel tank release, the easy to close trunk etc etc..guess I am spoiled..but I do love the XM radio.. I had a problem with the keyless entry system but hopefully they have figured it out. Bring back the real Seville.

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  Awesome remake of this vehicle - 2005 Cadillac STS
  By tark - March 19 - 8:06 pm

  I am so pleased with the remake of this car. It is a huge improvement over the previous models. This is the most fun car I have ever driven and I rent vehicles weekly in my travels. Highly recommended.

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  great car - 2005 Cadillac STS
  By keith duggan - March 12 - 11:55 am

  Great handling and great pickup when passing other vehicles. This car demands to be driven. The ride is unbelivable, its the first car my wife has been able to sleep in while on a trip. Great job Cadillac!

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  I love my STS! - 2005 Cadillac STS
  By swirls - March 12 - 9:28 am

  its a solid vehicle with lots of bells and whistles. The adaptability of the vehicle to my needs is superb. All of the instruments are within reach and plainly displayed with out being striking or obvious. This car has real presence with a stylishness that is classic and not trendy. I also received a wealth of information to further enhance my Cadillac experience. I encourgage anyone who is curious to give this one a spin. Youll be hooked!

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  STS - 2005 Cadillac STS
  By Belinda Mitchell - March 12 - 3:53 am

  Its a wonderful vehicle. I have the rear wheel drive vehicle and the performance in the snow is still good. It is excellent in rainy weather. Cadillacs traction control makes up about for the lack of all wheel drive. But, if you drive in heavy snow go for the all wheel drive.

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  Former Import Loyalist - 2005 Cadillac STS
  By PMS - March 5 - 8:37 am

  I must say that I have been a loyal import consumer until I looked at the Cadillac STS. After extensive research and test driving, I fell in love with my new STS. The interior, drive, performance and comfort could not be duplicated for the price. It has awesome technology. So far its been a pleasure to own.

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  05 STS fun To Drive - 2005 Cadillac STS
  By Rick - February 17 - 12:44 am

  What a beautiful car. Fun to drive. The most quiet car I have ever been in. The power in the V-6 is more than needed. Buyng a V8 would be a waste. Or you just want too much power. You cannot feel the trany shift. Smooth as silk. Just a great car.

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  Not ready for prime time - 2005 Cadillac STS
  By Chris - February 16 - 6:35 pm

  This is my fifth STS. Great performance and style other than the added spoiler. Poor fit on the rear doors & trim. Bluetooth phone still not functional, traction contol is disengaged under sport shift - no solution yet. Various other glitches (remote start did not supply fuel, transmission stumble at low speeds). Trunk is quite bit smaller than the outgoing model. A potentially great car introduced before it was debugged.

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  Im impressed with my new STS - 2005 Cadillac STS
  By Samuel Halter - February 9 - 1:26 am

  My Cadillac STS is very new, but so far, Im impressed. The sound system, HUD, OnStar, keyless entry/starting, 18 inch wheels and XM radio are outstanding features. The car also looks great.

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  "The" Car to Have ... - 2005 Cadillac STS
  By DG1 - February 8 - 11:33 pm

  I have owned the AWD Cadillac STS for about three months and 5,000 miles. It is down right fantastic! The car performs even better then it looks. The interior is beautiful and several steps up from my previous CTS. Anyone looking for the best all around car in the world should simply start looking at your nearest Cadillac dealer. If you bring your checkbook, you will want to buy the STS .