can someone tell me if this car can be customized with car audio, e.g head unit, amp, subwoofer?
http://www.carsales.com.au/used-cars/dealer/BMW/523i/details.aspx?__Ntk=CarAll&__D=1999&__Dx=mode+matchany&seot=0&__Ns=pCar_StatusSort_Int32|1||pCar_Price_Decimal|0&Cr=0&state_id=0&keywords=1999&State=All%20States&__N=4294967079+0+834+258+287+285+1216+4294966837+&distance=25&R=5790404&RegionID=&__Ntt=1999&trecs=4&__Nne=20&__Ntx=mode+matchallpartial&silo=1000&__sid=11A123B1D190&Model=523i&__Qpb=true&Region=All%20Regions&Make=BMW
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