Volvo S40 front fog light bulbs utilize H8, H11, or H3 sizes, while rear fog light bulbs use P21W size specifications. The replacement chart covers 2000 through 2011 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 Volvo S40 front fog light uses three distinct bulb types across its model years, with H3 fitted from 2000-2004, H11 from 2005-2007, and H8 from 2008-2011.
The H8 bulb is a single-filament halogen unit operating at 12V and 35W, seated in a PGJ19-1 base, and carries ECE approval for use in Europe and worldwide markets as well as the US.
The H11 bulb shares the single-filament halogen construction of the H8 but draws 55W rather than 35W, and uses a PGJ19-2 base, making it physically incompatible with H8 sockets despite the two types appearing similar.
The PGJ19-1 base of the H8 and the PGJ19-2 base of the H11 are distinct fittings, so the two bulbs are not interchangeable even though both belong to the PGJ19 family.
The H3 bulb, used in the Volvo S40 front fog light from 2000-2004, operates at 12V and 55W and uses a PK22s base, a single-pin connector design that differs entirely from the PGJ19-series bases used in later model years.
The H3 holds ECE approval for Europe and worldwide use, and is additionally approved in Japan, giving it broader international certification than the H8 or H11.
All three front fog light bulb types fitted to the S40 are single-filament halogens, meaning each controls only one lighting function and contains no secondary filament for a backup or alternate output.
The rear fog light of the S40 uses the P21W bulb across all model years from 2000-2011, representing the only fog light position with no change in bulb specification across the entire production span covered.
The P21W is a single-filament signalling bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and carries ECE approval for Europe and worldwide markets.
The BA15s bayonet base of the P21W is mechanically and electrically incompatible with the PGJ19-series and PK22s bases used in the front fog positions, so no cross-fitment between front and rear fog bulbs is possible.