Lexus SC400 Map Light Bulb Size

The Lexus SC400 map light requires a bulb size of 57 for the interior lighting system. Data for the specific bulb application covers the range from 1995 to 2000.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1995-2000	57

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57

Other Locations

Additional Notes

The Lexus SC400 uses the 57 bulb for the map light across the 1995-2000 model years.
The 57 bulb is an ANSI-standardized type recognized in both the United States and Canada.
It is a single-filament bulb, meaning it serves one lighting function rather than switching between two brightness levels.
The 57 bulb operates at 12 volts and draws 1 watt, placing it among the lower-wattage bulbs found in automotive interior applications.
It uses a BA9s base, which is a small bayonet-style cap with a 9mm collar and a single locating pin.
The BA9s base requires a specific socket and is not interchangeable with other bayonet base types such as the larger BA15s.