One problem related to automatic transmission park/neutral start switch has been reported for the 1999 Lexus RX300. The most recently reported issues are listed below.
When the temperture is 50 degrees or lower outside vehicle does not perform properly. Owners guide says after 2 minutes vehicle should be ready to operate, but while driving it takes vehicle 3 minutes to shift up to 3rd gear, causing the vehicle to travel at 30 mph or less. Dealer has been contacted.