Volkswagen Jetta Headlight Bulb Size

Additional Notes

• The 9004 bulb is the most frequently specified type across the Volkswagen Jetta headlight data, appearing in both high beam and low beam positions for model years 1985-1996, as well as in certain 1997-1999 two-headlamp configurations. The 9004 is a dual-filament halogen bulb that serves both high and low beam functions within a single housing, operating at 65W for high beam and 45W for low beam.
• The H7 bulb is a single-filament halogen type rated at 55W and 12V, and it appears across multiple Jetta model years in both high and low beam roles. Because H7 is a single-filament design, separate bulbs are required for each beam function, unlike dual-filament types such as the 9004.
• The 2015-2016 Jetta with HID headlamps uses the D3S bulb for both high and low beam, while halogen-equipped versions of the same years use H7. The D3S is a high-intensity discharge bulb that operates without a separate ignition wire, as the ballast and igniter are integrated, and it is not interchangeable with D2S despite the similar designation.
• The 2006-2009 Jetta low beam position lists either H7 or D2S depending on headlamp type, while the high beam for those same years specifies only H7. The D2S is an HID bulb that requires an external igniter, distinguishing it from the D3S used in later model years.
• The 1999 Jetta carries three distinct high beam specifications and three distinct low beam specifications within a single model year, varying by production timing and headlamp count. Early two-headlamp models use 9004 for both beams, early four-headlamp models use 9005 for high beam and 9006 for low beam, and late models use 9007 for both positions.
• The 9005 and 9006 bulbs are single-filament halogen types used in four-headlamp Jetta configurations from 1997-1999. The 9005 handles the high beam function at 65W, while the 9006 handles the low beam at 55W. These two bulbs share the same base type but are not interchangeable due to differences in tab positioning that prevent incorrect installation.
• The 9007 bulb, specified for the 1999 late model, 2000, and 2004 Jetta in both beam positions, is a dual-filament halogen type rated at 65W for high beam and 55W for low beam. It uses a different base configuration than the 9004, and the two are not cross-compatible despite both being dual-filament designs.
• The 1980-1983 Jetta uses sealed beam bulb types rather than replaceable capsule bulbs. The H4651 is specified for the high beam position across 1981-1984, while the low beam position uses H4656 for 1981-1984 and H4652 for 1980. Sealed beam units contain the filament, reflector, and lens as a single non-separable assembly.
• The 2021 Jetta specifies H11 for both the high beam and low beam positions, making it the only model year in the dataset where H11 appears. The H11 is a single-filament halogen bulb rated at 55W with an L-shaped base, and its use in both positions indicates separate bulbs are required for each function.
• Several Jetta model years carry multiple valid bulb specifications for the same beam position due to headlamp system variations within that year. Selecting the incorrect bulb type based on headlamp system, whether halogen or HID, or headlamp count, whether two or four, results in a non-fitting or non-functioning installation.