AW: In particular, the physical shape of the OE radio or navigation must be identical with the Z-E2026. Further info on vehicle compliance is best derived by checking the vehicle compatibility list or else, using the ZENEC online configurator tool.

The Z-E2026 is equipped with a phase diversity twin tuner. This means that both tuner inputs of the Z-E2026 need to receive FM antenna signal. A second FM antenna can be retrofitted with OE spare part, depending on the VW vehicle model. For cases where retrofitting a second VW OE FM antenna seems too expensive, a cost effective alternative is provided by the ZE-NC-ANT3 antenna adapter, which creates a twin FM signal from a single FM antenna input signal. Which means, aside of Z-E2026 and the ZE-NC-ANT3 interface, no other additional wires are required for correct phase diversity tuner operation.