The Kia Telluride turn signal requires a bulb size of P21/5W for the lighting assembly. Data for the specified bulb size covers the range from 2023 to 2024.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Kia Telluride's turn signal specifications reference four bulb types across front and rear positions: 1157NA, 1157, P21/5W, and 7443.
All four bulb types share identical electrical ratings of 12V with a dual-filament output of 21W and 5W, where the higher wattage filament serves the primary signal function and the lower wattage filament serves a secondary role such as parking or running light.
The 1157NA and 1157 share the same BAY15d bayonet base and 12V, 21W/5W ratings, making them electrically equivalent. The distinction is that the 1157NA incorporates natural amber-tinted glass, which produces an amber signal output without relying on an amber lens.
The Kia Telluride (2021) front turn signal uses the 1157, while the 2022 model uses the 1157NA. These two types are physically interchangeable due to the shared BAY15d base, but substituting a clear 1157 where an 1157NA is specified may affect the color output of the signal if the housing lens is also clear.
The P21/5W is governed by ECE standards, which are used in Europe and most international markets, whereas the 1157, 1157NA, and 7443 follow ANSI standards used in the United States and Canada.
Despite the P21/5W and the 1157 series sharing the BAY15d base and identical wattage ratings, they are defined under different regulatory standards and are not confirmed as interchangeable within these specifications.
The 7443 uses a wedge-type base, classified as a T20 wedge, which is physically incompatible with the BAY15d bayonet base found in the 1157, 1157NA, and P21/5W bulbs.
The Kia Telluride rear turn signal uses the 7443 for the 2021-2022 model years and the P21/5W for the 2023 model year, representing a base-type change between these periods that makes the two bulbs non-interchangeable.