Hyundai Veloster front turn signal uses PY21W, 2357NA, or 1156NA bulb size, while rear turn signal requires PY21W or 1156NA size. The replacement chart covers 2012 to 2021 production 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 1156NA is the most frequently specified bulb across the Hyundai Veloster turn signal data, appearing in both front and rear positions for the 2012-2017 model years. It follows the ANSI standard used in the US and Canada, operates on a single filament at 12V and 21W, and uses a BA15s bayonet base with natural amber glass to produce its amber output.
The PY21W is an ECE-standard bulb used in markets across Europe and worldwide. It is also a single-filament design rated at 12V and 21W, but it uses a BAU15s bayonet base rather than the BA15s found on the 1156NA. The offset pin arrangement of the BAU15s base makes the PY21W physically non-interchangeable with 1156NA sockets.
The 2357NA is a dual-filament bulb rated at 12V with a high-intensity filament drawing 26.9W and a low-intensity filament drawing 8W. It uses a BAY15d bayonet base, which has two pins at different heights to prevent incorrect installation. Like the 1156NA, it carries natural amber glass and meets ANSI standards.
For the 2021 Hyundai Veloster, both the front and rear turn signals share the same PY21W specification, making it the only model year in the data where a single bulb type covers both positions simultaneously.
The front turn signal for the 2019-2020 model years uses the 2357NA, a dual-filament bulb, while the rear turn signal for those same years uses the single-filament 1156NA. The two positions therefore require different bulb types and have incompatible bases during that period.
The BAY15d base of the 2357NA and the BA15s base of the 1156NA are both 15mm bayonet fittings, but the dual-pin offset of the BAY15d prevents a 2357NA from seating into a BA15s socket, and vice versa, making the two bulbs non-interchangeable despite their similar physical scale.
The 1156NA and PY21W share the same 21W power rating, but their base types differ. Substituting one for the other is not possible without a socket adapter, as the BAU15s base of the PY21W has an offset pin that does not align with a standard BA15s socket.
No turn signal data is present in the specifications for the 2018 Hyundai Veloster, meaning the listed fitment information moves directly from the 2017 to the 2019 model year.