Buick Terraza Back Up Light Bulb Size

The Buick Terraza back up light requires a 3157 bulb size for proper installation and function within the rear lighting assembly. Data for the specified component covers the period from 2005 through 2007.

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
2005-2007	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

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Additional Notes

The 3157 is the specified back up light bulb size for the Buick Terraza across the 2005-2007 model years.
The 3157 bulb follows the ANSI standard, which governs bulb specifications in the United States and Canada.
It is a dual-filament bulb, meaning it contains two separate filaments within a single housing, each operating at a different wattage.
The two filaments are rated at 27W and 7W respectively, with the higher-wattage filament typically serving the brighter function and the lower-wattage filament serving a secondary function.
The bulb operates on a 12V electrical system, consistent with standard automotive voltage.
The 3157 is classified as a T25 wedge-type bulb, referring to its wedge-shaped base that seats directly into a socket without a separate metal base or bayonet pins.