Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 2004 Volkswagen GTI.
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Low Beam: HID-D3S · High Beam: HID-D3S
Low Beam HID-D3S · High Beam HID-D3S
The Night Breaker 220 is the premium pick when performance matters more than chasing the whitest possible color. It improves low and high beam output while keeping a warmer, weather-friendly stock-style tone.
General BulbFacts housing testA matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
Support independent testing: BulbFacts may earn a commission from qualifying purchases through these links, at no extra cost to you. Affiliate relationships do not determine test results or recommendations.
Available exterior and interior lighting data for this model year.
Fitment, factory-system research, and BulbFacts product tests remain separate evidence. A matching bulb size does not by itself make a conversion a vehicle-specific recommendation.
| Position | Bulb or system | Evidence status |
|---|---|---|
| Low BeamLighting: HID | HID-D3S | Likely fitment |
| High BeamLighting: HID | HID-D3S | Likely fitment |
Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.
