What sound system do you have? - BMW 3-Series (E90 E92) Forum
Amazon.com: Android 11 Car Stereo with Wireless Apple Carplay Android Auto for BMW 3 Series 2005-2011 (E90/E91/E92/E93) 9 Inch HD Touchscreen Car Radio with Backup Camera GPS Navigation WiFi HiFi SWC Bluetooth
Audison Front Speakers and Subwoofer Bundle Compatible With 05-11 BMW 3 Series Limo/Sedan E90 HiFi Sound System - Creative Audio
BMW 08-13 E90 E92 E93 M3 Top HiFi Rear Quarter Panel Tweeter Speaker 7 | M Parts Worldwide LLC
Alpine HiFi Retrofit Kit - BMW 3-Series (E90 E92) Forum