Volvo WAH Headlight Bulb Size

Volvo WAH high beam and low beam headlight bulbs use 9004 or H6024 size specifications. The replacement chart covers 1996 to 1998 production 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.

High Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1998	9004	HB1	Check Price
1996-1997	9004 (With Halogen Capsule Headlamps)	HB1	Check Price
1996-1997	H6024 (With Sealed Beam Headlamps)	H6024	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1998	9004	HB1	Check Price
1996-1997	9004 (With Halogen Capsule Headlamps)	HB1	Check Price
1996-1997	H6024 (With Sealed Beam Headlamps)	H6024	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004	Check Price
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024	Check Price

Other Locations

Additional Notes

The 9004 is a dual-filament halogen bulb operating at 12V with a wattage rating of 65W on the high beam filament and 45W on the low beam filament, fitted with a P29t base. Because both filaments are housed in a single bulb, the 9004 serves both high and low beam functions within one unit.
The H6024 is a 7-inch round sealed beam unit conforming to the ANSI standard used in the United States and Canada. Unlike a replaceable bulb, the entire sealed beam assembly is the light source itself, meaning the whole unit is replaced when the light fails rather than an internal component.
The Volvo WAH for 1996-1997 was available with either halogen capsule headlamps or sealed beam headlamps, and the correct bulb type depends entirely on which headlamp system the vehicle carries. These two systems are not interchangeable with one another.
For the 1998 model year, the WAH uses the 9004 bulb for both high and low beam positions without any conditional fitment variation, indicating that sealed beam headlamps were no longer listed as an option for that year.
Both the 9004 and H6024 conform to ANSI standards applicable in the United States and Canada, placing them within the North American automotive lighting standardization framework.
The 9004 bulb's dual-filament design means a single socket position handles both beam functions, which is a distinct wiring and socket arrangement compared to vehicles that use separate single-filament bulbs for each beam.