Buick Electra Map Light Bulb Size

Additional Notes

• The 211-2 is the most frequently specified map light bulb for the Buick Electra, appearing across eight model years spanning 1972-1979 and 1973. It is a festoon-type bulb with an SV8.5 base, a 41mm length, and operates at 12V with a 12W output.
• The bulb type 90 is the second most recurring specification, covering nine model years from 1959-1968 with a gap at 1961. It uses a BA15s single-contact bayonet base and operates at 12V, 13W.
• Festoon bulbs account for the majority of map light specifications across the Electra's model history. Types 562, 211-2, and 561 all fall into this category, differing in base type and length.
• The 562 and 561 are both 44mm festoon bulbs rated at 12V and 12W, with end-cap contacts. Despite their near-identical specifications, they carry distinct ANSI designations and are not listed as interchangeable within these specifications.
• The 211-2 festoon bulb is 41mm in length, making it physically shorter than the 562 and 561. Installing a 44mm bulb in a housing designed for a 41mm fitment may result in improper seating or contact failure.
• The 1004 bulb, specified for the 1980 and 1982 Electra, is a dual-filament BAY15d bayonet bulb rated at 12V and 21/5W. Its dual-filament design and higher wattage distinguish it significantly from the festoon types used in surrounding model years.
• The 1971 Buick Electra uses a 194 miniature wedge bulb (T10) rated at 12V and 3.78W. This is the lowest-wattage bulb in the entire specification set, and its wedge base is mechanically incompatible with the bayonet or festoon housings used in other model years.
• The BAY15d base of the 1004 bulb features an offset pin arrangement that prevents incorrect insertion, a design characteristic shared with its variant, the 1157. This base type is physically and electrically distinct from the BA15s bayonet base found on the type 90 bulb.
• All bulb types listed across the Electra's map light specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the model's production span.
• The 1974 Electra is the only model year in the specification set assigned the 561 bulb. All other model years using a 44mm festoon bulb are assigned the 562, making the 561 an isolated fitment within this vehicle's history.