Volkswagen Golf Headlight Bulb Size

Additional Notes

• The H7 bulb is the most frequently specified type across the Volkswagen Golf's headlight fitment data, appearing in both high beam and low beam positions across multiple model years from 2000-2002 and continuing into 2015-2021 for halogen-equipped variants. It is an ECE-standard single-filament halogen bulb rated at 12V and 55W, using a PX26d base, and carries approval in the US and Japan in addition to European and worldwide markets.
• The D3S is a mercury-free HID (xenon) discharge bulb rated at 42V and 35W, using a PK32d-5 base with an integral ignitor. It is designed specifically for projector-type housings and appears in both high beam and low beam positions on the Volkswagen Golf for 2015-2018 model years equipped with HID headlamps.
• The 9004 bulb is an ANSI-standard dual-filament halogen type rated at 12V with a high-filament output of 65W and a low-filament output of 45W, using a P29t base. Because it carries both filaments in a single unit, it serves both high beam and low beam functions simultaneously, and it is specified for the Golf from 1993-1998 as well as certain 1999 early-model configurations with two headlamps.
• The H15 is a dual-filament halogen bulb under ECE standards, rated at 12V with a 55W high-filament and a 15W low-filament, using a PGJ23t-1 base. It is specified exclusively in the high beam position for the Golf in 2015-2017 model years equipped with halogen capsule headlamps, making it distinct from the single-filament types used in other positions.
• The H9 is an ECE-standard single-filament halogen bulb rated at 12V and 65W, using a PGJ19-5 base. It is specified for the high beam position on the Golf for the 2019 model year with halogen capsule headlamps and also for the 2021 model year, where it represents one of two high beam options alongside the H11.
• The 2021 Volkswagen Golf carries two separate high beam bulb specifications, H11 and H9, and two separate low beam bulb specifications, H11 and H7, indicating that fitment varies depending on the specific headlamp assembly installed on the vehicle. Selecting the wrong type for a given assembly would result in an incompatible fit.
• The 9004 bulb's dual-filament design means it is not interchangeable with the 9005 or 9006 bulbs, which are single-filament types. On the Golf, 1996-1999 configurations with four headlamps use the 9005 for high beam and the 9006 for low beam as separate units, while two-headlamp configurations use the single 9004 to handle both functions.
• The D3S bulb operates at 42V, which is substantially higher than the 12V rating of all halogen types in these specifications. This voltage difference means HID and halogen headlamp assemblies are not electrically or mechanically interchangeable, and the D3S requires the projector-type housing it is designed for.
• The H11 and H9 bulbs share a similar physical family but use different bases, PGJ19-2 and PGJ19-5 respectively, and carry different wattage ratings of 55W and 65W. Despite their visual similarity, these differences in base design and power draw make them non-interchangeable between sockets.
• The 1999 Golf carries three distinct high beam and three distinct low beam specifications, differentiated by early-model two-headlamp, early-model four-headlamp, and late-model configurations. This makes the 1999 model year one of the more fitment-sensitive years in the dataset, as the correct bulb type depends on both the production period and the headlamp count of the specific vehicle.