Hyundai Elantra GT front turn signal bulbs use 2357NA or 1156NA sizes, while rear turn signal bulbs require 1156NA size. The replacement bulb size chart covers 2013 to 2020 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156NA is a single-filament bulb operating at 12V and 21W, fitted with a BA15s bayonet base and natural amber glass. It serves as the rear turn signal bulb across all listed model years of the Hyundai Elantra GT, spanning 2013-2020.
The 2357NA is a dual-filament bulb rated at 12V with a high/low filament draw of 26.9W and 8W respectively. It uses a BAY15d bayonet base and natural amber glass. Both the 1156NA and 2357NA carry ANSI standardization recognized in the United States and Canada.
The BAY15d base of the 2357NA and the BA15s base of the 1156NA are physically distinct. The BAY15d base features offset locking pins to accommodate dual-filament operation, while the BA15s base uses a single-pin alignment suited to single-filament designs. These two bulb types are not interchangeable.
The natural amber glass designation in both the 1156NA and 2357NA indicates that the amber color is produced by the glass envelope itself rather than by a coating or lens filter, which is a relevant distinction in turn signal applications where color output consistency is regulated.
For the front turn signal position, the Hyundai Elantra GT used the 2357NA from 2013-2017, then shifted to the 1156NA for the 2018-2019 model years on vehicles equipped with halogen capsule headlamps, before returning to the 2357NA for 2020, again specified under the halogen capsule headlamp condition.
The halogen capsule headlamp condition noted for the 2018-2020 front turn signal entries indicates that the specified bulb sizes apply specifically to that headlamp configuration, reflecting that front turn signal fitment on the Elantra GT can vary depending on the headlamp assembly installed.
Because the front turn signal position uses either a 2357NA or a 1156NA depending on the model year and headlamp type, and both bulbs share a visually similar bayonet form factor, confirming the correct base type before installation is necessary to avoid fitment errors.
The rear turn signal position presents no such configuration dependency, as the 1156NA with its BA15s base applies uniformly across all listed years from 2013-2020 without any noted conditional variants.