Plymouth Grand Voyager Dome Light Bulb Size

Additional Notes

• The Plymouth Grand Voyager dome light draws from three distinct bulb types across its model years: the 579, 212-2, and 211-2, all of which are ANSI-standardized festoon bulbs rated at 12V and 12W.
• Festoon bulbs are cylindrical lamps that mount horizontally between two spring-clip contacts at either end of a housing, a design common in interior automotive lighting applications.
• The 579 bulb is specified for the Plymouth Grand Voyager for model years 1996-2000 and has a 44mm length with end-cap contacts.
• The 212-2 bulb is specified for model years 1992-1995 and has a 41mm length with an SV8.5 base.
• The 211-2 bulb is specified for model years 1987-1991 and shares the same 41mm length and SV8.5 base as the 212-2.
• The SV8.5 base designation refers to a festoon base with an 8.5mm body width, a standard sizing classification used to indicate physical socket compatibility.
• Although the 212-2 and 211-2 share identical voltage, wattage, length, and base type, they carry different ANSI designations and are not guaranteed to be interchangeable without confirming socket and filament specifications.
• The 579 uses end-cap contacts rather than an SV8.5 base, making it physically incompatible with housings designed for the 212-2 or 211-2, despite sharing the same voltage and wattage ratings.
• The 1mm difference in length between the 579 at 44mm and the 212-2 or 211-2 at 41mm is a relevant fitment factor, as festoon bulb housings are sized to hold a specific length under spring tension.