Volkswagen Eos high beam and low beam headlight bulbs utilize D3S, H7, or D1S bulb sizes depending on production specifications. The replacement chart covers 2007 through 2016 model years with corresponding bulb size data.
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 Volkswagen Eos headlight specifications cover two distinct headlamp system types across all model years: HID (xenon) and halogen capsule. The correct bulb type is determined entirely by which headlamp system is installed on the vehicle, as the two systems are not interchangeable.
The H7 is the halogen bulb used across all Eos model years from 2007-2016 for both high and low beam positions. It is a single-filament bulb rated at 12V and 55W, fitted with a PX26d base, and carries ECE approval for use in Europe and worldwide, as well as approval in the United States and Japan.
Two different HID bulb types appear across the Eos production run. The D1S applies to 2007-2011 models equipped with HID headlamps, while the D3S applies to 2012-2016 models with HID headlamps. These two bulb types share the same 35W power rating but differ in operating voltage and base type, making them non-interchangeable.
The D1S operates at 85V and uses a PK32d-2 base with an integral ignitor. The D3S operates at 42V and uses a PK32d-5 base, also with an integral ignitor. Despite the similar base designations, the differing pin configurations mean one cannot substitute for the other.
Both the D1S and D3S are designed exclusively for projector-type housings. Installing either HID bulb type into a non-projector housing would produce improper light distribution.
The D3S is a mercury-free formulation, distinguishing it from earlier HID standards such as the D1S. This reflects a design difference relevant to disposal and environmental compliance, not to light output or wattage, which remains 35W for both types.
On the Volkswagen Eos, the same bulb type serves both the high beam and low beam positions within a given headlamp system. In HID-equipped vehicles, beam switching is handled by the projector housing mechanism rather than by separate bulbs for each function.
All three bulb types listed in the specifications, the H7, D1S, and D3S, conform to ECE standards, indicating they are rated and tested under European and international regulatory frameworks rather than the separate SAE standards used in North American-only markets.