The Buick Rendezvous uses 3457NA or 3457 bulb size for front turn signals and 3157 bulb size for rear turn signals. The replacement chart covers 2002 through 2007 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Buick Rendezvous uses two dual-filament bulb types across its front and rear turn signal positions: the 3457 series for the front and the 3157 for the rear. Both share the T25 wedge form factor and operate at 12V with a 27W/7W filament rating, where the higher wattage filament serves the turn signal function and the lower wattage filament serves a secondary lighting function.
The 3457NA was fitted to the front turn signal of the 2004-2007 Rendezvous. The "NA" designation indicates natural amber glass, meaning the bulb envelope itself is tinted amber rather than clear.
The 2002-2003 Rendezvous front turn signal used the 3457 instead of the 3457NA. The 3457 is a clear-envelope bulb, relying on an amber-colored lens housing to produce the required turn signal color rather than the glass of the bulb itself.
Substituting a 3457 for a 3457NA, or vice versa, affects the color output at the lens. In a housing designed for a natural amber bulb, a clear bulb may produce a different visible hue depending on lens tint.
The rear turn signal position used the 3157 across all model years from 2002-2007 without variation. The 3157 shares the same T25 wedge base and 12V/27W/7W electrical ratings as the 3457 series but is not interchangeable with the front bulbs due to differences in the base pin configuration between the two bulb families.
All three bulb types, the 3457NA, 3457, and 3157, conform to ANSI standards applicable in both the United States and Canada, indicating standardized electrical and physical specifications across those markets.
The T25 designation refers to the wedge base size of the bulb. While the 3457 and 3157 series both use a T25 wedge base, their internal pin arrangements differ, which prevents cross-position installation despite the shared base category.