Volvo XC60 front fog light bulbs use H8 size, while rear fog light bulbs use H21W or P21W size specifications. The replacement chart covers 2010 to 2017 production 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 XC60 front fog light uses the H8 bulb across the 2010-2016 model years, making it the most consistently specified bulb type in these fog light listings.
The H8 is a single-filament halogen bulb rated at 12V and 35W, fitted with a PGJ19-1 base. It is produced to ECE standards, with approval also extended to the US market.
The rear fog light of the Volvo XC60 is specified with two different bulb types depending on the model year, meaning the position is not served by a single universal fitment across the full range covered.
The XC60 rear fog light for 2010-2012 uses the P21W bulb, which is a single-filament signalling bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
From 2013-2017, the XC60 rear fog light transitions to the H21W bulb. Like the P21W, it is rated at 12V and 21W, but it uses a BAY9s base rather than a BA15s base.
The BA15s and BAY9s bases are physically incompatible with each other. The P21W and H21W share the same wattage rating but cannot be used interchangeably due to their differing base configurations.
Both the P21W and H21W are classified as signalling bulbs under ECE standards, distinguishing them functionally from the H8, which is classified as a halogen lighting bulb intended for forward illumination.
All three bulb types listed in these specifications operate on a 12V electrical system, consistent with standard automotive voltage.