Acura TSX Dome Light Bulb Size

The Acura TSX dome light requires a DE3175 bulb size for proper installation and function within the interior lighting system. Provided information covers a time range from 2004 through 2010 for the specified vehicle components.

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
2004-2010	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

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Additional Notes

The Acura TSX uses the DE3175 bulb size across all listed model years, spanning 2004-2010.
The DE3175 is classified as a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
A festoon bulb's end-cap contact design requires the bulb to be held under slight compression between two spring clips within the fixture, which is the standard mounting method for this type.
The DE3175 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification for physical and electrical characteristics.
The 31mm figure in the DE3175 designation refers to the length of the bulb, which is the critical fitment factor for festoon bulbs, as the fixture's spring-clip spacing must match.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Because the Acura TSX (2004-2010) uses the same DE3175 specification without variation across all listed model years, a single bulb type serves the entire production run covered by these specifications.