Oldsmobile Cutlass Dome Light Bulb Size

Additional Notes

• The 561 is the most frequently specified dome light bulb across the Oldsmobile Cutlass model range, appearing in seven model years spanning 1975-1976, 1980, and 1997-1999.
• The 211-2 is the second most common specification, covering ten model years from 1961 through 1979, with the exception of 1962 and certain years in the mid-1970s.
• Both the 561 and 211-2 are festoon-style bulbs operating at 12V and 12W, meaning they share identical electrical characteristics despite differing in physical length and base type.
• The 561 measures 44mm in length with end-cap contacts, while the 211-2 measures 41mm and uses an SV8.5 base, making the two bulbs physically non-interchangeable despite their matching voltage and wattage ratings.
• The 562, specified for the 1977 Oldsmobile Cutlass, shares the same 44mm festoon form factor and 12V/12W rating as the 561, though the two carry distinct ANSI designations.
• The 212-2, used in 1972 and 1974, is a close relative of the 211-2, sharing the same SV8.5 base, 41mm length, and 12V/12W output, but the separate ANSI designation indicates a distinct part number that should be confirmed before substitution.
• The 1004, specified for 1962 and 1978, differs fundamentally from all other bulbs in these specifications. It is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21/5W, a design more commonly associated with stop and tail light applications.
• The 1004 is noted as a variant of the 1157, a widely recognized automotive bulb, which places it in a different functional category from the festoon and wedge types used across the rest of the Cutlass dome light history.
• The 161, specified for the 1971 Oldsmobile Cutlass, is a miniature T10 wedge bulb rated at just 12V and 1W, representing a significantly lower output than every other bulb type in these specifications.
• All six bulb types in these specifications conform to ANSI standards recognized in both the United States and Canada, classifying them as standardized replacements within the North American automotive market.