Ferrari Testarossa high beam headlight bulbs measure H5001 in size, while low beam headlight bulbs measure H5006, with each bulb size corresponding to specific lighting functions on the vehicle. The replacement chart covers 1985 to 1989 production years and details bulb size specifications for each model year within that range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ferrari Testarossa uses the H5001 bulb type for high beam headlights across all 1985-1989 model years.
The H5001 is a 4-inch square sealed beam unit operating at 12V. Because it is a sealed beam design, the entire unit is replaced rather than an internal filament or capsule.
The H5006 is specified for low beam headlights on the Testarossa for all 1985-1989 model years.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and also replaced as a complete assembly rather than as an individual bulb.
Both the H5001 and H5006 conform to ANSI standards applicable in the United States and Canada, meaning they follow a standardized sizing and performance classification system used across North American automotive lighting.
The H5001 and H5006 are physically distinct units. The H5001 is square while the H5006 is round, and their housing sizes differ, making the two types non-interchangeable between the high beam and low beam positions.