Genesis G70 front turn signal uses 2357NA or 2357 bulb size, while rear turn signal requires 3156 bulb size for replacement. The chart covers 2019 to 2021 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Genesis G70 front turn signal uses the 2357NA bulb for the 2021 model year. This is a dual-filament ANSI-standard bulb rated at 12V with a 26.9W high filament and 8W low filament, fitted with a BAY15d bayonet base. Its natural amber glass produces the required turn signal color without relying on a colored lens or housing.
The 2019 Genesis G70 front turn signal uses the 2357 bulb, though only on trims equipped with halogen capsule headlamps. The 2357 shares the same BAY15d bayonet base and 12V, 26.9W/8W electrical ratings as the 2357NA, but its glass envelope is clear rather than amber-tinted.
The 2357 and 2357NA are not identical despite sharing the same base type and wattage ratings. The NA designation on the 2357NA indicates a natural amber coating on the glass, which is a factory-applied tint. Substituting one for the other may affect the color output of the turn signal depending on the lens design of the vehicle.
Both the 2357 and 2357NA are described as brighter variants of the 1157 bulb. The 1157 is a widely used dual-filament BAY15d bulb, and the 2357 series draws more wattage on its high filament, resulting in greater light output in that mode.
The rear turn signal on the Genesis G70 uses the 3156 bulb for both the 2019 and 2021 model years. This is a single-filament T25 wedge bulb rated at 12V and 27W under ANSI standards applicable in the US and Canada.
The 3156 is a single-filament bulb, which distinguishes it functionally from the dual-filament 2357 and 2357NA used at the front. A single-filament rear turn signal bulb serves only one switching function, whereas dual-filament front bulbs can serve multiple lighting roles simultaneously.
The T25 designation on the 3156 refers to its wedge base form factor. Wedge-base bulbs are retained by the socket through tension rather than a twist-lock or bayonet mechanism, which is a different installation method than the BAY15d base used by the front turn signal bulbs.
The BAY15d base used by both the 2357 and 2357NA is an offset dual-contact bayonet fitting. The offset pin positions prevent the bulb from being inserted in the wrong orientation, which is relevant given that the two filaments serve different functions within the same socket.