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Adding VOLVO FACTORY AUX to your 2005+ S40/V50 | SwedeSpeed - Volvo Performance Forum
Amazon.com: beler 14 Pin Bluetooth Audio AUX Adapter Cable fit for Volvo C30 S40 V40 V50 S60 S70 C70 : Electronics
Bluetooth Handsfree USB SD A2DP Adapter Fits Volvo XC90 S40 S80 V50 V70 C30 C70 | eBay
AUX input VOLVO V50, S40, C30, C70, XC90 from JustTech on Tindie
Car Bluetooth Module AUX-IN Audio adapter for For Volvo C30 S40 V40 V50 S60 S70 C70 V70 XC70 S80 XC90 | Wish
Amazon.com: CITALL Interior Bluetooth Adapter AUX Cable Fit for Volvo C30 C70 S40 S60 S70 S80 V40 V50 V70 XC70 : Electronics
HOWTO: AUX-in for your V50, basic sound system. | Page 19 | SwedeSpeed - Volvo Performance Forum
Carplay 'mod' in my V50 : r/Volvo
Adding AUX to CD unit | SwedeSpeed - Volvo Performance Forum