This 2001 Audi S4 sedan, with 149k miles, features a twin-turbocharged 2.7-liter V6 and Quattro all-wheel drive, enhanced with an APR ECU, downpipe, and UUC Motorwerks shifter and exhaust. Notable options include the Premium Package and Bose audio, though the car has some cosmetic imperfections, a sagging headliner, worn carpet, and an illuminated ABS light. It comes with a clean Carfax and California title, having been with the current seller for 19 years.