Answer by  
                                                                                          caftril (176)
                                                            
                          
                          
                                                          Premium audio systems are usually by Bose for both Infiniti and high-end Nissans. Satellite XM/Sirius is usually also an option. The factory radios are often 6 speaker and may include a hard drive for mp3 collections or an iPod charger/sync dock or cable. Some factory units have steering wheel mounted controls. Other systems must fit the specific vehicle wiring harness.