The Genesis G90 high beam and low beam headlight bulbs both utilize the D1S size. The replacement chart covers 2017 through 2019 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The D1S is the sole bulb type specified across all headlight positions in the Genesis G90 for the 2017-2019 model years, covering both high beam and low beam functions.
The D1S is a High-Intensity Discharge (HID) xenon bulb, meaning it produces light through an electrical arc between tungsten electrodes within a xenon gas-filled quartz capsule, rather than through a heated filament.
All D1S fitments in these specifications are conditional on the vehicle being equipped with HID headlamps, indicating that this bulb type is not applicable to non-HID headlamp configurations.
The D1S operates at 85 volts and 35 watts, which reflects the high-voltage ignition requirement typical of HID discharge technology, distinguishing it from standard 12-volt automotive bulbs.
The D1S features a PK32d-2 base with an integral ignitor, meaning the ignitor is built directly into the bulb unit rather than housed separately within the headlamp assembly.
The D1S is designed exclusively for projector-type headlamp housings, which use a lens and reflector system to focus and direct the light output with precision.
The D1S is manufactured to the ECE standard, a regulatory framework recognized across Europe and numerous other markets worldwide, governing the photometric and safety requirements of the bulb.
Because the D1S incorporates an integral ignitor, it is not interchangeable with the D1R bulb, which shares the same electrical ratings but uses a different base configuration and is intended for reflector-type housings.