The Dodge Challenger dome light utilizes bulb sizes 578, 562, and 1004 depending on the specific production period for the vehicle interior lighting components. Available information covers the span from 1970 through 2023 for the listed automotive lighting specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge Challenger uses the 578 bulb as its dome light across the 2008-2023 model years, making it by far the most consistently specified bulb type in these dome light records.
The 578 is a festoon-style bulb rated at 12V and 12W, with a 41mm length and end-cap contacts that seat into spring-loaded holders at each end of the fixture.
For the 2021-2023 model years, the Dodge Challenger specifies separate front and rear dome light positions, with the front dome using the 578 and the rear dome using the 12961.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W, which is a notably lower wattage than the 578 used in the front dome position.
Because the 578 and 12961 use entirely different base types, festoon end-cap versus wedge, they are not interchangeable with each other despite both serving dome light functions in the same vehicle.
The 1974 Challenger dome light uses the 562 bulb, a festoon type rated at 12V and 12W with a 44mm length, which is 3mm longer than the 578 and therefore not a direct physical substitute for it.
The 1970-1973 Challenger dome light uses the 1004 bulb, a dual-filament type with a BAY15d bayonet base rated at 12V and 21/5W, which operates on a fundamentally different base design than the festoon bulbs used in later model years.
The 1004 is described as a variant of the 1157, sharing the BAY15d bayonet base, which means the two share a base form factor, though their filament and wattage ratings may differ.
All four bulb types specified across these records, the 578, 562, 1004, and 12961, conform to ANSI standards for the US and Canadian markets, with the exception of the 12961, which carries a Philips part number rather than an ANSI designation.
The shift from the BAY15d bayonet-based 1004 in the early 1970s models to the festoon-style 578 in the modern generation reflects a change in base technology between the two distinct production eras of the Challenger.