Replacement of the OEM HU is generally disfavored. It is capable of producing a good signal, especially when recoded to HiFi. Additionally
complete removal of the OEM HU can cause error codes or inability to update software . For that reason,
relocation of the Head Unit to the trunk is usually recommended to the few who choose this route.
The closest to an OEM look head unit is the
Dynavin D99. It integrates with the vehicle's CANBUS for some data, but not the MOST BUS, thus errors are still possible.