Installing a Subwoofer into a Passat Estate! - YouTube
Amazon.com: Add A Subwoofer Bass Amplifier Adapter Interface w/Amp Remote Turn On Wire to Factory Car Stereo Radio for some 2015+ VW Volkswagen Vehicles - compatible vehicles listed below : Electronics
OEM Front Door Woofer Sackbut Subwoofer Bass Speaker for PQ Golf 6 MK6 Passat CC B7 3CD 035 454A _ - AliExpress Mobile
Focal Ic VW 165 Speaker 16,5 CM Compatible With VW Passat Cc (3C/35) 2008 -> | eBay