One problem related to accelerator pedal has been reported for the 1999 Lexus LS400. The most recently reported issues are listed below.
Lexus LS 400 1999 model. Dangerous hesitation upon acceleration. Further after driving this car for two years, I have neck pains from the daily whiplash. Toyota is igrnoring this system wide. It is an outrage. Its damaging peoples necks all over the country. They will not fix it - they claim its normal. Other dealers are telling customers about it - - my wife refuses to drive my car - it's dangerous!.