Plymouth Neon front side marker bulbs use 168 or 3157NA size, while rear side marker bulbs require 916 size. The replacement chart covers 1995 to 2001 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Neon front side marker uses the 168 bulb for model years 1996-2001. This is a T10 miniature wedge bulb rated at 12V and 4.9W, standardized under ANSI specifications for the US and Canadian markets.
The 1995 Plymouth Neon front side marker uses the 3157NA bulb, which differs from all other model years in this specification set. The 3157NA is a T25 dual-filament wedge bulb with natural amber glass, rated at 12V with a 27W/7W output across its two filaments.
The natural amber glass of the 3157NA bulb produces a colored output without relying on a tinted lens, which distinguishes it from clear-glass bulbs that depend on the housing for color filtering.
The dual-filament design of the 3157NA means it carries two independent circuits within a single bulb, a characteristic absent in the single-filament 168 used in later model years.
The wattage difference between the 1995 front side marker bulb (3157NA at 27W/7W) and the 1996-2001 front side marker bulb (168 at 4.9W) reflects a significant change in power draw, which has implications for socket and wiring compatibility.
The Plymouth Neon rear side marker uses the 916 bulb for model years 1995-1999. This is a T15 wedge bulb rated at 12V and 18W, also standardized under ANSI specifications for the US and Canadian markets.
The T10, T15, and T25 designations refer to the tubular envelope width of each bulb, expressed in eighths of an inch. The 168 (T10), 916 (T15), and 3157NA (T25) are therefore physically distinct sizes and are not interchangeable with one another.
All three bulb types in these specifications use a wedge base rather than a bayonet or screw base. A wedge base is held in place by tension from the socket contacts rather than a locking mechanism.
The 168 and 916 bulbs are both single-filament types, while the 3157NA carries dual filaments. Substituting a single-filament bulb into a socket wired for dual-filament operation would result in only one circuit being served.
All bulbs listed across both sub-parts operate at 12V, consistent with standard automotive electrical systems.