The Lexus LS430 dome light requires a DE3175 bulb size for proper installation and function within the interior lighting housing. Available data covers the specific range from 2004 through 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus LS430 uses two distinct bulb types across its dome light positions: the DE3175 for the front dome light and the bulb 57 for the rear dome light.
The DE3175 is an ANSI-standard festoon bulb rated at 12V, measuring 31mm in length with end-cap contacts on both ends. This contact style means the bulb is held under tension between two metal clips rather than inserted into a socket.
The bulb 57 is an ANSI-standard single-filament bulb rated at 12V and 1W, fitted with a BA9s bayonet base. The BA9s designation refers to a miniature single-pin bayonet cap with a 9mm base width.
The DE3175 and bulb 57 are not interchangeable. Their base types, physical form factors, and wattage ratings are different, and each position in the Lexus LS430 (2001-2006) is designed for its respective bulb type.
The front dome light of the Lexus LS430 uses the DE3175 across all six model years covered in the specifications, from 2001 through 2006.
The rear dome light uses the bulb 57 across all six model years from 2001 through 2006, consistent with the lower light output typically associated with secondary or accent interior lighting positions.
Both the DE3175 and bulb 57 conform to ANSI standards applicable in the United States and Canada, indicating standardized sizing and electrical ratings within those markets.
The general dome light position, listed separately from the sub-parts, specifies the DE3175 for 2004-2006 only, while the front dome light sub-part extends that same bulb fitment back to 2001.