Audi A3 Sportback e-tron Back Up Light Bulb Size

The Audi A3 Sportback e-tron back up light requires a specific H6W bulb size for proper installation and function within the rear lighting assembly. Data for the specified component covers the period from 2016 to 2018.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2016-2018	H6W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAX9s base. 12V, 6W.	H6W

Other Locations

Additional Notes

The H6W is the sole bulb type listed across all documented model years of the Audi A3 Sportback e-tron back up light, covering 2016-2018.
The H6W operates at 12 volts and 6 watts, classifying it as a low-wattage single-filament signalling bulb rather than an illumination bulb.
The H6W uses a BAX9s base, which is an offset pin cap. The pin offset is a deliberate anti-misfit feature, meaning the bulb can only be seated in one orientation within the socket.
The H6W is governed by ECE regulations, a standard recognized across Europe and numerous markets worldwide, meaning it is not a bulb type common in North American vehicle applications.
Because the BAX9s base is specific to the H6W family, substitution with bulbs using standard BA9s bases is not possible without a socket adapter, as the pin positions are not interchangeable.