Volkswagen Golf Alltrack front fog light bulbs use H11 size while rear fog light bulbs use 7440 size. The replacement chart covers 2017 to 2019 production years with bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen Golf Alltrack front fog light uses the H11 bulb across the 2017-2019 model years.
The H11 is a single-filament halogen bulb operating at 12V and 55W, built to the ECE standard used in Europe and worldwide, with approval also granted in the United States. It uses a PGJ19-2 base.
The PGJ19-2 base is a keyed, projector-style base designed to allow only one insertion orientation, which ensures correct filament positioning within the housing.
The Volkswagen Golf Alltrack (2017-2018) rear fog light uses the 7440 bulb.
The 7440 is a single-filament wedge bulb in the T20 form factor, rated at 12V and 21W, built to the ANSI standard used in the United States and Canada.
The T20 wedge base relies on the bulb body itself to make electrical contact with the socket, rather than a separate metal base, which is a defining characteristic of the wedge bulb family.
Both the H11 and 7440 are single-filament bulbs, meaning each serves only one lighting function rather than combining two functions such as stop and tail into a single unit.
The H11 at 55W draws significantly more power than the 7440 at 21W, reflecting the different performance requirements between front fog illumination and rear fog signaling.
The H11 and 7440 use entirely different base types and are not interchangeable with each other or with bulbs outside their respective fitment positions.