The Porsche 718 Boxster high beam and low beam headlight bulbs both use the D3S size. The chart contains bulb size specifications for vehicles produced between 2017 and 2021.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.
The D3S is the sole bulb type specified across all listed model years of the Porsche 718 Boxster, appearing in both high beam and low beam positions.
The D3S is a High-Intensity Discharge (HID) xenon bulb operating at 42 volts and 35 watts, placing it in the low-wattage, high-efficiency category typical of factory HID systems.
Unlike older HID designs, the D3S incorporates an integral ignitor built directly into the bulb body, meaning the ignitor and bulb are replaced as a single unit rather than separately.
The D3S uses a PK32d-5 base, which is a keyed push-and-twist fitting specific to the D3S standard and not shared with other common HID types such as the D1S or D2S.
The D3S is mercury-free, conforming to environmental regulations that restrict hazardous substances in electrical components sold in Europe and other markets.
The bulb meets ECE (Economic Commission for Europe) standards, indicating it is approved for road use in Europe and numerous other regions that follow ECE lighting regulations.
The D3S is designed exclusively for projector-type headlight housings, and fitting it into a reflector-type housing would produce incorrect light distribution.
For the 2017-2019 model years, the D3S fitment is conditional, applying only to vehicles equipped with HID headlamps, which indicates that alternative headlamp configurations existed in those years.
The 2021 model year lists the D3S without a conditional HID notation, suggesting that HID headlamps were the standard configuration for that year rather than an optional one.
Because the PK32d-5 base is unique to the D3S family, substitution with physically similar HID bulbs of different base types is not compatible with this application.