Hyundai Ioniq 5 Turn Signal Bulb Size

Hyundai Ioniq 5 front turn signal bulbs use a PY21W size specification across the model line. The replacement chart covers 2022 to 2024 vehicle production years with corresponding bulb size data.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

Years	Bulb Size
2022-2024	PY21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.	PY21W

Other Locations

Additional Notes

The PY21W is the specified front turn signal bulb for the Hyundai Ioniq 5 across the 2022-2024 model years.
PY21W is an ECE-regulated bulb type, meaning it conforms to European and international lighting standards rather than SAE standards used in North American domestic applications.
The bulb operates at 12 volts with a 21-watt output, which is a standard wattage for single-filament turn signal applications in ECE-compliant vehicles.
PY21W uses a BAU15s bayonet base, which is an offset-pin base. The pins are not aligned symmetrically, which means the bulb can only be inserted in one rotational orientation and is not interchangeable with the more common BA15s or BAY15d bases.
The amber coloration of the PY21W is built into the glass envelope itself rather than produced by an amber-colored lens, which is a characteristic of ECE-standard turn signal bulbs.
Because the BAU15s base is specific to the PY21W family, substituting a bulb with a BA15s or BAY15d base would result in an incorrect physical fit regardless of wattage or voltage compatibility.