Peugeot 405 high beam and low beam headlight bulbs both utilize a 9004 bulb size. The replacement chart covers vehicle production years spanning 1989 to 1991.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9004 bulb is a dual-filament halogen type, meaning a single bulb contains two separate filaments to serve two distinct lighting functions within one housing.
Operating on 12 volts, the 9004 draws 65 watts on its high-filament circuit and 45 watts on its low-filament circuit, reflecting the greater luminous output required for high beam operation.
The 9004 uses a P29t base, a three-contact connector that allows the vehicle's electrical system to activate either filament independently depending on the selected beam mode.
The 9004 is defined under ANSI standards and is approved for use in the United States and Canada, classifying it as a regulated automotive lighting component within those markets.
In the Peugeot 405, the 9004 bulb serves both the high beam headlight and the low beam headlight positions across the 1989-1991 model years, meaning a single bulb type fulfills both functions in the same headlight assembly.
Because the high beam and low beam positions share the same 9004 specification, the two circuits rely on the dual-filament design of that bulb rather than separate single-filament bulbs installed in distinct housings.