The Plymouth Neon brake light utilizes 3157 and 2458 bulb sizes for the lighting system. Data for the specific components covers the period from 1995 through 2001.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Neon uses the 3157 bulb for its brake lights across the full 1995-2001 model range.
The 3157 is a dual-filament wedge bulb of the T25 type, rated at 12V with a wattage split of 27W for the high-intensity filament and 7W for the low-intensity filament, conforming to ANSI standards recognized in both the United States and Canada.
The dual-filament design of the 3157 allows a single bulb to serve two lighting functions, which is why it is a common choice for brake and tail light applications where both a bright stop signal and a dimmer running light are required from one socket.
The center high mount stop light on the Plymouth Neon uses the 921 bulb across the same 1995-2001 model range.
The 921 is a single-filament wedge bulb of the T15 type, rated at 12V and 16W, also conforming to ANSI standards for the United States and Canada.
Because the 3157 is a dual-filament bulb and the 921 is a single-filament bulb, the two types are not interchangeable despite both using wedge-style bases, as their filament configurations and socket designs differ.
The T25 designation of the 3157 refers to a wedge base size larger than the T15 base of the 921, which further prevents cross-installation between the two positions.