Accurate prediction of the vehicle buffeting phenomenon requires capturing the bidirectional coupling between the transient shear layer aerodynamics (vortex shedding) and the acoustic response of the cabin. Quantitatively correct prediction of the flow-excited resonance requires an accurate prediction of complex transient behavior, including turbulent vortex formation, shedding, and convection through the shear layer; and direct capture of the acoustic interaction requires a compressible solver. In addition, the acoustic response of the vehicle cabin must be modeled correctly. Because small geometric details can significantly impact the shear layer/acoustic coupling behavior, a high degree of accuracy with fully detailed geometry is required. These considerations make simulation of vehicle buffeting a challenging problem, especially when predicting the severity (peak levels) for a given vehicle design and the effectiveness of various buffeting suppression methods.