Dealer Letter: In our continuing efforts to ensure the best in customer satisfaction, Lexus is announcing a Warranty Enhancement Program to extend the warranty coverage for the Brake Actuator Assembly on certain 2006 ? 2007 GS 430, 2007 ? 2011 GS 450h, 2008 ? 2011 GS 460, 2007 ? 2012 LS 460, and 2006 ? 2008 RX 400h Vehicles. In these vehicles, Lexus has received some reports where various brake system related warning lamps illuminate due to internal malfunctions of the Brake Actuator assembly. Although the Brake Actuator Assembly is covered by Lexus? New Vehicle Limited Warranty for 4 years or 50,000 miles (whichever comes first), we at Lexus care about the customers? ownership experience. Lexus is now extending the warranty coverage for repairs related to internal malfunctions of the Brake Actuator Assembly.