Amazon.com: Add A Bass Subwoofer Amplifier Adapter Interface w/Amp Remote Wire to Factory OEM Car Stereo Radio for select VW Made for Jetta Golf CC Passat EOS Tiguan etc- Vehicles listed below :
Oem Front Door Woofer Sackbut Subwoofer Bass Speaker For Vw Golf 6 Mk6 Passat Cc B7 3cd 035 454a - Speakers - AliExpress
Amazon.com: VW OE Upgrade Speaker for CC Passat Passat Wagon : Electronics