BMW i3 high beam headlight uses H11 bulb size and low beam headlight uses H7 bulb size. The replacement chart covers 2014 to 2018 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.
The BMW i3 uses the H11 bulb type for the high beam headlight position across all listed model years, spanning 2014-2018.
The H11 is a single-filament halogen bulb operating at 55 watts with a PGJ19-2 base, commonly used in dedicated high beam or low beam applications where a single-filament design is sufficient.
The low beam headlight position on the BMW i3 is fitted with the H7 bulb type for 2014-2018, though this applies specifically to vehicles equipped with halogen capsule headlamps.
The H7 is a single-filament halogen bulb rated at 55 watts with a PX26d base, and it is among the most widely used bulb types in European automotive lighting applications.
The halogen capsule headlamp qualifier on the BMW i3 low beam position indicates that this fitment is conditional on the type of headlamp assembly installed, meaning not all i3 units of those years necessarily use the H7 in that position.
The H11 and H7 bulb types are not interchangeable with each other despite both being single-filament 55-watt halogens, as they use physically different base configurations that prevent cross-fitting.
Both the H11 and H7 belong to the PGJ and PX base families respectively, which are keyed designs intended to ensure correct installation orientation and prevent incorrect bulb substitution.