Plymouth Cuda Dome Light Bulb Size

The Plymouth Cuda dome light utilizes 1004, 211-2, and 257 bulb sizes depending on the specific application. Data for the bulb sizes covers the range from 1970 to 1974.

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
1973-1974	1004
1972	211-2
1971	257
1970	1004

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W.	257

Other Locations

Additional Notes

The Plymouth Cuda dome light specifications cover model years 1970-1974 and reference three distinct bulb types across that span: the 1004, 211-2, and 257.
The 1004 bulb is the most frequently specified type for the Plymouth Cuda dome light, appearing in the 1970, 1973, and 1974 model years.
The 1004 is an ANSI-standard dual-filament bulb rated at 12V and 21/5W, fitted with a BAY15d bayonet base. It is a variant of the widely used 1157 bulb.
Because the 1004 is a dual-filament bulb, it carries two separate wattage ratings. The higher filament (21W) and lower filament (5W) serve different circuit functions, which is a relevant consideration when substituting bulbs in dome light applications.
The 1972 Plymouth Cuda uses the 211-2, a festoon-style bulb with an SV8.5 base, rated at 12V and 12W, with a 41mm length. Festoon bulbs mount by compression between two end caps rather than by a base socket.
The 1971 Plymouth Cuda uses the 257, rated at 12V and 2W. The 257 is specified as either a festoon or BA9s base instrument bulb, indicating it is a low-output bulb relative to the other types listed in these specifications.
The three bulb types referenced are not interchangeable with one another. The 1004 uses a BAY15d bayonet base, the 211-2 uses an SV8.5 festoon base, and the 257 uses either a festoon or BA9s base, each representing a physically distinct mounting configuration.
All three bulb types conform to ANSI standards applicable in both the United States and Canada.
The shift from the 1004 in 1970 to the 257 in 1971, then to the 211-2 in 1972, and back to the 1004 in 1973-1974 reflects non-uniform bulb fitment across consecutive model years of the Plymouth Cuda, making year-specific verification necessary before replacement.