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 :
2014 Volkswagen Passat Gets Sony Mobile ES Speaker Upgrade
Alpine - SPC-600G7 Subwoofer System for VW Golf 7, Golf 6 and others
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2015 VW Passat B7 TDI | DiyMobileAudio.com Car Stereo Forum
2015 VW Passat B7 TDI | DiyMobileAudio.com Car Stereo Forum
Volkswagen Passat B6 - how to connect the amplifier and subwoofer to the factory