Toyota Yaris Map Light Bulb Size

The Toyota Yaris map light requires a 57 bulb size or a 168 bulb size depending on the specific configuration of the lighting assembly. Data for the bulb sizes covers the range from 2013 to 2019.

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
2019	57
2018	168
2013-2014	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Toyota Yaris map light uses two distinct bulb types across its model years: the 57 and the 168, both of which are ANSI-standardized bulbs rated for use in the US and Canada.
The 57 bulb is a single-filament type with a BA9s bayonet base, operating at 12V and drawing 1W. The BA9s base uses a pin-and-socket retention method rather than a friction-fit wedge.
The 168 bulb is a T10 miniature wedge type, operating at 12V and drawing 4.9W. The wedge base is held in place by the socket itself, with no separate locking mechanism.
At 4.9W, the 168 draws considerably more power than the 1W 57 bulb. The two types are not interchangeable due to their different base designs and wattage ratings.
The 2019 Toyota Yaris uses the 57 bulb for the map light, while the 2013-2014 and 2018 model years use the 168 bulb.
The BA9s base on the 57 and the wedge base on the 168 are physically incompatible with each other's sockets, making cross-substitution between these two bulb types impossible without socket modification.