Subaru BRZ Map Light Bulb Size

Subaru BRZ map light bulb replacement uses 168 and DE3175 size bulbs. The chart covers 2013 to 2023 production years with corresponding bulb size specifications.

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
2023	168
2013-2019	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

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Additional Notes

The Subaru BRZ map light specifications reference two distinct bulb types: the 168 and the DE3175. These are not interchangeable, as they differ in both physical form and contact design.
The DE3175 is a festoon-style bulb with a 31mm length and end-cap contacts. This contact style means the bulb seats by pressing its two end caps against spring-loaded terminals inside the housing, rather than inserting into a socket.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W. The wedge base is formed by the glass envelope itself, which is pinched flat at the base to grip the socket directly without a separate metal cap.
Both the 168 and DE3175 are ANSI-standardized bulbs recognized in the US and Canadian markets, meaning replacements conforming to those designations are widely available across multiple manufacturers.
The DE3175 specification applies to the Subaru BRZ across the 2013-2019 model years for the map light position.
The 2023 BRZ map light uses the 168 wedge bulb rather than the DE3175 festoon type, indicating a housing design change that requires a different bulb form factor for that year.
Because the festoon DE3175 and the wedge-base 168 use fundamentally different mounting and contact systems, a bulb from one category cannot be physically installed in a housing designed for the other.