Chevrolet Cobalt Fog Light Bulb Size

Chevrolet Cobalt front fog light bulbs use an H11 size. The replacement chart covers 2005 to 2010 vehicle production years with bulb size specifications.

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

Front Fog Light

Years	Bulb Type	Shop
2005-2010	H11	Check Price

Bulb Specifications

Description	Type	Shop
ECE standard (Europe & worldwide). Single-filament halogen bulb with PGJ19-2 base. Also approved in the US. 12V, 55W.	H11	Check Price

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Additional Notes

The front fog lights on the Chevrolet Cobalt use the H11 bulb across all listed model years, spanning 2005-2010.
The H11 is a single-filament halogen bulb, meaning it serves one lighting function only and does not combine multiple roles such as high and low beam within a single unit.
H11 bulbs are built to the ECE standard, a regulatory framework used across Europe and internationally, though the bulb also carries approval for use in the United States.
The H11 operates at 12 volts and 55 watts, which are the standard electrical ratings for this bulb type in automotive fog light applications.
The H11 uses a PGJ19-2 base, a keyed connector design that physically prevents installation of incompatible bulb types sharing a similar appearance but differing in base configuration, such as the H8 or H9.
The H8, H9, and H11 bulbs share the same PGJ19-2 base family but differ in wattage and, in some cases, filament position, which affects optical output and may not align correctly with a given housing's focal design.