Jeep Liberty Dome Light Bulb Size

The Jeep Liberty dome light requires bulb size 578 or 212-2 depending on the specific vehicle configuration. Available data covers the range from 2002 through 2012 for the specified lighting components.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2004-2012	578
2002-2003	212-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2

Other Locations

Additional Notes

The Jeep Liberty uses two distinct bulb types across its model years for the dome light position: the 578 and the 212-2.
Both the 578 and 212-2 are ANSI-standardized festoon bulbs rated at 12V and 12W, sharing identical voltage, wattage, and physical length of 41mm.
A festoon bulb is a cylindrical lamp that mounts horizontally between two spring-loaded contacts or a fixed housing, which is a common configuration in automotive interior lighting.
The 578 bulb uses end-cap contacts, meaning electrical connection is made through metal caps at each end of the bulb body.
The 212-2 bulb uses an SV8.5 base, a bayonet-style single-contact base that differs mechanically from the end-cap design of the 578, despite the two bulbs sharing the same 41mm length and electrical ratings.
Because the 578 and 212-2 differ in base type, they are not directly interchangeable, even though their physical length and power ratings are identical.
The Jeep Liberty (2004-2012) takes the 578 bulb for the dome light, spanning nine consecutive model years.
The 2002-2003 Liberty uses the 212-2 bulb instead, representing the earlier base configuration for this position.