The 9007 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 65W for high beam output and one rated at 55W for low beam output.
The 9007 operates on a 12-volt electrical system, which is standard across conventional passenger vehicles.
The 9007 uses a PX29t base, a specific connector type that is not universally interchangeable with other halogen base designs, such as the H4 or 9004, despite those also being dual-filament halogen bulbs.
The 9007 carries ANSI standardization recognized in both the United States and Canada, indicating the bulb conforms to a defined set of electrical and photometric requirements in those markets.
The Plymouth Neon uses the 9007 for both the high beam and low beam headlight positions across the 1995-2001 model years, with a single bulb type serving both functions in each housing.
Because the high and low beams share one bulb per headlight assembly, failure of the 9007 bulb results in the simultaneous loss of both beam modes on the affected side.
The 9004 bulb is a visually similar dual-filament halogen type but has a different wattage configuration and a non-identical base orientation, making it incompatible as a direct substitute for the 9007.