In 1995-up Volkswagen Golf and Jetta vehicles, Volkswagen uses a non-standard antenna jack that won't work with your new replacement radio. This simple in-line adapter has a standard male Motorola antenna plug, and a female Volkswagen/Audi jack on the other. Just connect your VW antenna cable to the adapter, plug it into your new stereo, and you're good to go. This adapter also supplies power to the factory antenna booster. Warranty: 30 days.