Clutch problems of the 2002 Lexus IS300

I own a 5-speed manual 2002 Lexus Is300. Currently, my car has 40,000 miles. Everything in the vehicle is stock, no modified parts and accesories. I drive this car normal like any other manual transmission cars. I rev match when I downshift, never ride the clutch etc. . . I have been driving manual cars for the last 10 years. A few days ago, I noticed that the transmission clutched began to slip as I was accelerating on-ramp onto freeway. The car is drivable but I have to be careful accelerating and passing or else, the clutch slips and car won't accelerate. Because of this premature clutch failure, I can't drive the car as it was intended to be. I drive it really slow. Painfully slow. I can't believe Lexus (Toyota) won't warranty this item. Most manual transmission cars' clutches have a lifetime of at least 100,000 miles. As an engineer, I see this as a manufacturer defect. Because of this incident, I will never ever persuade potential Lexus buyers in buying Lexus vehicles.

Transmissiong was replaced and clutch. New clutch wore in in 24,000 miles. Claimed it was wear and tear. Never had a clutch go out that early ever!.

Clutch throw out bearing, clutch disc, pressure plate, fly wheel,clutch master cylinder replaced after 13000 miles.