Application of haptics in automobiles is a promising topic. We are working on assistive systems for drivers such as lane departure warning system (LDWS), as well as tactile applications of entertainment systems in automobiles. We evaluated the effectiveness of various non-intrusive torque patterns generated by a steering wheel as warning signal, as well as delivering directional informations to the drivers. As an in-car entertainment system, we are working on improved haptic rendering algorithm for vibrotactile seats. The algorithm extracts salient features of audio signal and appropriately convert to vibrotactile effects. The system supports the augmented musical experience to users by the multimodal interaction scheme. This work is supported by Next Generation Vehicle (NGV) of Hyundai Motor Group, Korea.