Chrysler Town & Country Dome Light Bulb Size

Additional Notes

• The 211-2 and 212-2 are the most frequently specified bulb types across the Chrysler Town & Country dome light history. Both are 41mm festoon bulbs with an SV8.5 base, rated at 12V and 12W, and share identical physical and electrical characteristics despite carrying different ANSI designations.
• Because the 211-2 and 212-2 share the same 41mm length, SV8.5 base, 12V rating, and 12W output, they are generally considered interchangeable in practice. However, substitution should be confirmed against the specific model year requirement before installation.
• The 578 bulb is specified for the Chrysler Town & Country across the 2001-2016 model years, with the exception of 2000. It is a 41mm festoon type with end-cap contacts, rated at 12V and 12W.
• The 579 bulb differs from the 578 in one key respect: its length is 44mm rather than 41mm. Both share the same end-cap contact design and 12V, 12W rating, but the 3mm difference in length makes them physically non-interchangeable in most housings.
• The 578 and 579 are both end-cap festoon bulbs, whereas the 211-2 and 212-2 use an SV8.5 base. This base difference means festoon bulbs from these two groups are not interchangeable with each other, even where wattage and voltage ratings match.
• The 1004 bulb, specified for the 1956-1968 model years, is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21/5W. Its bayonet base and dual-filament construction make it a distinct departure from the festoon-type bulbs used in later model years.
• The 906 bulb, specified solely for the 1990 model year, is a T10 miniature wedge type rated at 12V and 8W. At 8W, it operates at a lower wattage than the festoon bulbs used in surrounding model years, and its wedge base is physically incompatible with festoon or bayonet sockets.
• The 257 bulb, specified for the 1971 model year only, is rated at just 12V and 2W, substantially lower in output than any other bulb type in these specifications. It uses a festoon or BA9s base configuration, which differs from the SV8.5 base of the 211-2 used in adjacent model years.
• All bulb types listed across these specifications conform to ANSI standards applicable to the US and Canadian markets, indicating consistent regulatory compliance across the full production span covered.
• The transition from the 1004 bayonet bulb to the 211-2 festoon type between the 1968 and 1969 model years represents a socket and base change that makes bulbs from those two periods mutually incompatible.