Nothing has gone wrong.
Had a Lexus dealership and a local mechanic check over the car. Both agreed the car is in superb condition. No leaks anywhere, everything original, and original screws have not been turned -- indicating nothing has been replaced.
Have had this SC300 just a short time. I am impressed with both its performance and its comfort. It's a silken drive. My other car is an exotic, and the Lexus compares favorably to it. It's got some power, and handles quite well. For its age, it's pretty impressive -- with a lot of futuristic features that were ahead of their time, and still function perfectly.
Acceleration is smooth. It has no problem leaping from 60 to 85. The gas pedal is extremely responsive, almost too much so. Braking is smooth and effortless -- though I do like to pump them a little till the car warms up.
For a sports coupe, it was pretty pricey, at nearly 50,000 loaded, when it came out in 1999. It's not an easy car to find in sterling condition, but a little searching should net you a great, reliable, serviceably-quick vehicle.
Inside it's luxurious. Features are easy to locate and use. Overall I give this car high marks. If you're looking for a sports coupe that is fun to drive, handles well, and can be used for quick hilly jaunts or long straight drives, a used SC300 is well worth the price.
The SC300/400 are both amazing cars. We have 3 SC400s in the family. I bought my wife a 1993 SC400 for Christmas 1992. She had been driving a 1989 Mercedes 560SEL for the safety of our children. When the kids finally didn't need a car seat she wanted something sporty again. She really wanted the SL500 but I surprised her with the Lexus. At first she was a little hesitant, but after driving the car for a few weeks she fell in love. It wasn't until 1999 that she replaced that car with another SC400. The 93 is now my daughters car and people don't realize that its 14 years old. The car is in mint condition and only has 92,000 miles. My wife had to have the new SC430 when it came out in 2002 so her 99 SC400 was rarely driven. Only has a low 34,000 miles on it. For my wife's 40th birthday I surprised her with a Mercedes CLK500 convertible (2004). The Mercedes has a better ride and handling, but the Lexus fit and finish is incomparable. The wife rotates the SC430 and CLK500 each week. I just took delivery on a 2007 LS460L. Will write more on that in the months to come after I get familiar with it.