The Hyundai Elantra GT brake light requires a 2357 bulb size for proper installation and function within the lighting assembly. Data for the specific component covers the range from 2013 to 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 2357 bulb is the sole brake bulb type across all listed years of the Hyundai Elantra GT, spanning 2013-2020.
The 2357 follows the ANSI standard used in the US and Canada, operating at 12V with a dual-filament configuration rated at 26.9W and 8W respectively, and fitted with a BAY15d bayonet base.
As a dual-filament bulb, the 2357 serves two lighting functions from a single unit, with the higher-wattage filament handling the brake signal and the lower-wattage filament handling a secondary function such as running or tail light duty.
The 2357 is a brighter variant of the 1157, sharing the same BAY15d base, which means the two types are physically interchangeable in terms of fitment, though their output levels differ.
For the 2013-2014 Elantra GT, the Center High Mount Stop Light takes a P21W bulb rather than the 2357 used in the main brake position, making the two positions non-interchangeable despite both serving a brake-related function.
The P21W follows the ECE standard used in Europe and worldwide, operating at 12V with a single filament rated at 21W, and fitted with a BA15s bayonet base, which is a single-contact base distinct from the dual-contact BAY15d of the 2357.
For model years 2015-2018, the 2357 brake bulb specification applies only to vehicles without LED tail lights, indicating that LED-equipped trims use a different lighting arrangement not covered by this specification.
For model years 2019-2020, the 2357 specification is tied to vehicles with halogen capsule headlamps rather than referencing the tail light configuration, reflecting a change in how trim-level conditions were documented for those years.