Nissan 300ZX Map Light Bulb Size

The Nissan 300ZX map light utilizes bulb sizes 194, 158, and 89 depending on the specific version of the vehicle. Data for the lighting components covers the range from 1984 to 1996.

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
1993-1996	194
1990-1992	158
1984-1989	89

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	158
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89

Other Locations

Additional Notes

The Nissan 300ZX map light specifications cover model years 1984 through 1996, with three distinct bulb types used across that span: the 194, 158, and 89.
The 194 and 158 are both T10 miniature wedge bulbs operating at 12V, sharing the same physical base type, which means they occupy the same socket form factor despite differing in wattage.
The 194 bulb draws 3.78W, while the 158 draws 3W. Although both fit a T10 wedge socket, substituting one for the other introduces a wattage difference that may affect brightness or circuit load.
The 89 bulb uses a BA15s bayonet base, a single-contact base type that is physically incompatible with the T10 wedge socket used by the 194 and 158. Cross-substitution between these groups is not possible without a socket adapter.
The Nissan 300ZX (1993-1996) uses the 194 bulb for the map light position.
The 158 bulb is specified for the 1990-1992 model years.
The 89 bulb is specified for the 1984-1989 model years, making it the longest-running fitment across this specification set.
The 89 bulb is described as a lower wattage variant of the 1156, operating at 12V and 13W. Its BA15s bayonet base is a single-contact fitting, distinct from the dual-contact BA15d base found on some other automotive bulbs.
All three bulb types conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical tolerances across the range.
The transition from the 89 bayonet-base bulb to the T10 wedge-base 158 between the 1989 and 1990 model years reflects a socket-level change in the map light housing, not merely a bulb swap.