Volkswagen Phaeton high beam headlight bulbs measure 9005XS in size, while low beam headlight bulbs measure D1S in size. The replacement chart covers vehicle production years spanning 2004 to 2006 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 Volkswagen Phaeton uses the 9005XS for high beam headlights across its 2004-2006 model years. This bulb follows the ANSI standard, which governs lighting equipment in the United States and Canada, and operates at 12V and 65W with a single filament and a straight 180-degree base orientation.
The low beam headlight position on the Volkswagen Phaeton uses the D1S bulb across the same 2004-2006 span. The D1S is an HID (high-intensity discharge) xenon bulb that operates at 85V and 35W, producing light through an electrical arc rather than a heated filament.
The D1S bulb uses a PK32d-2 base and includes an integral ignitor, meaning the ignition component is built directly into the bulb unit rather than housed separately in the vehicle's lighting system.
The D1S is designed specifically for projector-type housings, which use a lens and reflector assembly to focus and shape the light output. Substituting this bulb into a non-projector housing would produce incorrect beam patterns.
The D1S follows the ECE standard, which applies to Europe and international markets, while the 9005XS follows the ANSI standard used in North America. The Phaeton's headlight system therefore combines bulbs from two different regulatory frameworks within a single vehicle.
The 9005XS is a short variant of the standard 9005 bulb, indicated by the "XS" suffix. While both share the same electrical ratings of 12V and 65W, the 9005XS has a reduced physical length, and the two are not interchangeable in housings designed for the shorter form factor.
Because the D1S has an integral ignitor, it is not interchangeable with D1R bulbs, which share the same electrical characteristics but differ in base shielding and are intended for reflector-type rather than projector-type housings.