Acura TSX Map Light Bulb Size

The Acura TSX map light requires a DE3175 bulb size for proper installation and function within the interior lighting system. Provided information covers a span of time starting in 2004 and ending in 2010.

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 for the map light across all listed model years, spanning 2004-2010.
The DE3175 is a festoon-type bulb, meaning it is cylindrical in shape and seats between two spring-loaded end caps rather than fitting into a socket with a base pin or bayonet mount.
The 31mm length of the DE3175 refers to the overall span of the bulb between its two end-cap contacts, which is the critical fitment factor for festoon bulbs in enclosed map light housings.
The DE3175 operates at 12 volts, consistent with standard automotive electrical systems.
The DE3175 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary part number.
Because festoon bulbs are sized by their contact-to-contact length, substituting a festoon bulb of a different length, such as a 28mm or 36mm unit, would result in an improper fit in the Acura TSX map light housing.