Plymouth Satellite Dome Light Bulb Size

The Plymouth Satellite dome light utilizes bulb sizes 1004, 211-2, and 257 depending on the specific vehicle configuration. Available information covers the period from 1965 through 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
1974	1004
1973	211-2
1972	1004
1971	257
1969-1970	211-2
1968	1004
1967	211-2
1965-1966	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 Satellite dome light specifications span the 1965-1974 model years, with three distinct bulb types appearing across that period: the 1004, the 211-2, and the 257.
The 1004 is the most frequently specified bulb in these records, appearing in the 1965, 1966, 1968, 1972, and 1974 Plymouth Satellite. It is a dual-filament bulb rated at 12V and 21/5W, fitted with a BAY15d bayonet base.
The 1004 is classified as a variant of the 1157 bulb under the ANSI standard used in the US and Canada. Its dual-filament design is more commonly associated with stop and tail light functions, which makes its use in a dome light application a notable fitment detail.
The 211-2 festoon bulb appears in the 1967, 1969, 1970, and 1973 Plymouth Satellite. It operates at 12V and 12W, with a 41mm length and an SV8.5 base.
Festoon bulbs such as the 211-2 are held in place by spring-loaded contacts at each end rather than a twist or bayonet socket, meaning the socket type is physically incompatible with the BAY15d base used by the 1004.
Because the 1004 and 211-2 use entirely different base types, they are not interchangeable. The dome light socket in any given Plymouth Satellite model year is designed for only one of these two configurations.
The 257 is specified exclusively for the 1971 Plymouth Satellite. It is rated at 12V and 2W, a significantly lower wattage than either the 1004 or the 211-2, and it accommodates either a festoon or a BA9s base.
The 257's 2W output is substantially lower than the 12W of the 211-2 and the 21/5W of the 1004, reflecting a considerably reduced light output for the 1971 dome light application.
All three bulb types in these specifications conform to ANSI standards applicable in the US and Canada, indicating standardized electrical and physical ratings across the domestic market.
The dome light bulb type in the Plymouth Satellite changed multiple times across the 1965-1974 production run, and the correct bulb for a given vehicle is determined strictly by model year rather than by any shared fitment across the full range.