Audi S8 high beam headlight bulbs use H7, D2S, or H8 sizes, while low beam headlight bulbs use D2S or H1 sizes depending on the specific model variant. The replacement chart covers vehicle production years from 2001 through 2017 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 H7 bulb is the most frequently specified size across the Audi S8 headlight data, appearing in high beam positions across multiple model years spanning 2001 through 2017. It is a single-filament halogen bulb operating on a PX26d base, commonly rated at 55 watts and designed for dedicated single-function lamp housings.
The D2S is the second most recurring bulb type in these specifications, appearing in both high beam and low beam positions. It is a high-intensity discharge bulb that requires a compatible ballast and igniter to operate, distinguishing it fundamentally from the halogen types listed alongside it.
For the 2015-2017 model years, the Audi S8 high beam headlight is specified exclusively with the H7 bulb, with no alternative fitment listed for those years.
The 2007 and 2008 model years present a dual-fitment situation for the high beam position, where the H7 applies to vehicles equipped with halogen capsule headlamps and the D2S applies to those equipped with HID headlamps. These two bulb types are not interchangeable, as they operate on entirely different electrical and optical principles.
The low beam headlight for the 2007-2009 model years is specified solely as D2S, with no halogen alternative listed for those years.
For the 2001-2003 model years, the low beam position also carries a dual-fitment condition. The H1 bulb applies to halogen capsule headlamp configurations, while the D2S applies to HID configurations. The H1 is a single-filament halogen bulb with a P14.5s base, physically and electrically distinct from the D2S.
The 2009 model year is the only year in which both the D2S and H8 are listed together for the high beam position. The H8 is a single-filament halogen bulb with a PGJ19-1 base, rated at 35 watts, and its concurrent listing with the D2S for that year indicates separate lamp configurations rather than interchangeability.
Across the full dataset, the Audi S8 high beam and low beam positions do not consistently share the same bulb type within a given model year, meaning the two positions must be treated as independent fitments when sourcing replacements.
The D2S bulb, used in HID headlamp configurations on the Audi S8, contains an arc tube rather than a tungsten filament. Substituting a halogen type such as H7 or H1 into an HID housing is not supported by these specifications and would be electrically incompatible.
The specifications for 2013 list only the H7 for the high beam with no corresponding low beam entry for that year, indicating the low beam data for 2013 is outside the scope of the provided specifications.