The Volkswagen Golf SportWagen turn signal requires a 7440NA bulb size for the specific lighting component located on the exterior of the vehicle. Data for the bulb specifications covers the range from 2018 through 2018.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen Golf SportWagen front turn signal uses one of two bulb types depending on headlamp configuration, with halogen capsule headlamp trims and HID headlamp trims requiring different bulbs across the 2015-2018 model years.
The 7440NA is a single-filament wedge bulb in the T20 form factor, rated at 12V and 21W, and conforms to the ANSI standard used in the United States and Canada. Its natural amber glass produces the required turn signal color without relying on a colored lens or housing.
The H21W is a single-filament signalling bulb rated at 12V and 21W, conforming to the ECE standard used in Europe and internationally. It uses a BAY9s bayonet base, which is physically distinct from the wedge base of the 7440NA, making the two bulbs non-interchangeable despite sharing the same wattage and voltage rating.
The 12174NA is an OEM part number designation for a natural amber glass variant rated at 12V. It appears in the front turn signal position on the Volkswagen Golf SportWagen for the 2015-2017 model years with halogen capsule headlamps, while the 2018-2019 halogen capsule configuration uses the 7440NA instead.
The rear turn signal on the Golf SportWagen uses the 7440NA across the 2015-2018 model years, with no headlamp-dependent variant split applied to that position.
The 2019 model year front turn signal data covers only the halogen capsule headlamp configuration, with the 7440NA specified for that trim. No rear turn signal entry exists for the 2019 model year in the specifications.
Because the H21W uses a BAY9s base and the 7440NA uses a wedge base, a vehicle equipped for one type cannot accept the other without a socket modification, making headlamp trim verification a necessary step before bulb selection on the 2015-2018 Golf SportWagen front turn signal position.