Hyundai Kona tail light bulbs include the inner tail light with 12961 size, outer tail light with P21/5W size, and tail light with 12961 and 1157 sizes. The replacement chart covers 2018 to 2024 model 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 Hyundai Kona outer tail light uses two distinct bulb types depending on the model year: the P21/5W for 2018-2020 vehicles equipped with halogen capsule headlamps, and either the 12961 or 1157 for 2021-2024 vehicles, with the specific type alternating between those years.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. It serves as the inner tail light bulb on the Hyundai Kona for 2018-2020 models with halogen capsule headlamps, and also appears in the outer tail light position for 2022 and 2024.
The P21/5W and 1157 bulbs share the same BAY15d bayonet base and identical electrical ratings of 12V with dual filaments at 21W and 5W. The P21/5W is governed by ECE standards used in Europe and worldwide markets, while the 1157 follows ANSI standards applicable to the US and Canada.
Because the P21/5W and 1157 share the BAY15d base and the same wattage ratings, they are physically and electrically similar, though they originate from different regional standardization bodies. Substituting one for the other without confirming regional certification compliance may affect regulatory conformity.
The halogen capsule headlamp condition noted for 2018-2020 Kona tail light fitments indicates that the listed bulb sizes apply specifically to that headlamp configuration, meaning vehicles of those years with a different headlamp type may not share the same tail light bulb requirements.
The T10 wedge format of the 12961 bulb is a single-filament design, making it unsuitable as a direct replacement in positions that require a dual-filament bulb such as the P21/5W or 1157, despite all three appearing within the same vehicle's lighting system.