Jeep Commander Back Up Light Bulb Size

Additional Notes

• The 3057 and 3157 are both ANSI-standardized bulb types recognized across the United States and Canada, meaning they conform to established electrical and physical specifications shared across the North American automotive market.
• Both bulb types share the T25 wedge form factor, a designation referring to a 25mm-wide plastic wedge base that connects directly into a matching socket without requiring a separate bulb holder or locking mechanism.
• Both the 3057 and 3157 operate on a 12-volt electrical system and carry a dual-filament design rated at 27 watts on the high filament and 7 watts on the low filament, making them suitable for functions requiring two distinct brightness levels from a single bulb.
• Despite sharing identical voltage ratings, wattage ratings, base type, and ANSI regional classification, the 3057 and 3157 are not the same part number and are not universally interchangeable across all vehicles or socket configurations.
• The Jeep Commander (2006-2008) uses the 3157 bulb for the back up light position, while the 2009-2010 model years use the 3057 instead, indicating a specification change occurred between the 2008 and 2009 production years.
• The physical similarity between the 3057 and 3157 can lead to fitment errors, as the two types differ in their internal filament wire positioning, which affects how current is distributed across the dual-filament circuit within the socket.