Pontiac Vibe front turn signal bulbs utilize 1034NA or 1157NA sizes, while rear turn signal bulbs require 7440 size specifications. The replacement chart covers 2003 through 2008 model years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The rear turn signal position on the Pontiac Vibe uses the 7440 bulb across all model years covered in the specifications, from 2003-2008.
The 7440 is a single-filament wedge bulb following the T20 form factor, rated at 12V and 21W under the ANSI standard applicable to the US and Canada.
The front turn signal position on the Pontiac Vibe uses two different bulb types depending on the model year, with the 1034NA fitted in 2003-2005 and 2008, and the 1157NA fitted in 2006-2007.
Both the 1034NA and 1157NA are dual-filament bulbs sharing the same BAY15d bayonet base and the same 12V, 21W/5W power ratings, and both carry natural amber glass.
The 1034NA is described in the specifications as a variant of the 1157NA, meaning the two types are closely related but are not unconditionally interchangeable across all applications.
Because the front turn signal position on the Pontiac Vibe alternates between the 1034NA and 1157NA across different model years, confirming the exact model year before selecting a replacement bulb is necessary to avoid a fitment mismatch.
The shared BAY15d bayonet base between the 1034NA and 1157NA means both bulbs mount in the same socket type, though the variant relationship between them may involve differences beyond the base and glass color.
The single-filament design of the 7440 contrasts with the dual-filament design of both front turn signal bulbs, reflecting the different functional requirements between the rear turn signal housing and the front position.