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 :
Fender Subwoofer Upgrade? | VW Vortex - Volkswagen Forum
For Vw Tiguan 2017---- Dynaudio Speaker 1 Set - Multi-tone & Claxon Horns - AliExpress
MDF closed subwoofer enclosure for VW Tiguan | eBay