Nissan Altima Courtesy Bulb Size

The Nissan Altima courtesy light utilizes bulb sizes 194, 158, and 161 depending on the specific version of the vehicle. Data for the lighting components covers the range from 1993 to 2023.

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	194
2019	194
2002-2006	158
1995-1997	161
1993-1994	158

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). Miniature wedge bulb (T10). 12V, 1W.	161

Other Locations

Additional Notes

The courtesy bulb specifications for the Nissan Altima reference three bulb types across the listed model years: 194, 158, and 161. All three are ANSI-standardized miniature wedge bulbs of the T10 form factor, operating on a 12-volt circuit.
The T10 wedge base is a common automotive bulb format in which the electrical contacts are formed directly from the base of the glass envelope, eliminating the need for a separate metal cap or socket pins.
The bulb 158 is the most frequently specified type across the listed years, appearing in the Nissan Altima for the 1993-1994 and 2002-2006 model years at a rated wattage of 3W.
The 194 bulb is specified for the 2019 and 2023 model years, carrying a rated output of 3.78W, which is the highest wattage among the three types listed in these specifications.
The 161 bulb, rated at 1W, is the lowest-wattage type in these specifications and is associated with the 1995-1997 model years of the Altima.
Although the 194, 158, and 161 bulbs share the same T10 wedge base, their wattage ratings differ. Substituting one for another may result in a mismatch with the original electrical load intended for that circuit position.
All three bulb types carry ANSI standardization applicable to both the United States and Canada, meaning their physical and electrical parameters conform to a defined industry specification rather than a proprietary standard.