Kia Forte Koup high beam headlight bulbs use H1 size, while low beam headlight bulbs use H11 or H11B size. The replacement chart covers 2010 through 2016 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H1 bulb is a single-filament halogen type operating at 55 watts, housed in a compact single-contact base. It is specified for the high beam headlight position across all model years of the Kia Forte Koup from 2010-2016.
The low beam headlight specification splits across two distinct bulb types depending on the model year. The 2010-2013 Forte Koup uses the H11B, while the 2014-2016 model years fitted with halogen capsule headlamps use the H11.
Although the H11 and H11B share the same general single-filament, 55-watt halogen construction, they are not interchangeable. The H11B features a modified base tab orientation that physically prevents an H11 bulb from seating correctly in an H11B socket, and vice versa.
The halogen capsule headlamp condition noted for the 2014-2016 low beam specification indicates that the H11 fitment applies specifically to vehicles equipped with that headlamp configuration, as opposed to projector-style or other headlamp assemblies.
The H1 bulb uses a single pin base, which is a distinct contact design from the twist-lock bases found on both the H11 and H11B. This means the high beam and low beam sockets on the Forte Koup are physically incompatible with each other by design.
Because the H11 and H11B are visually similar, confirming the exact base type before replacement is necessary to avoid fitment failure, particularly for the 2013 model year, which sits at the transition point between the two specifications.