Hyundai Elantra Parking Light Bulb Size

Additional Notes

• The 2357NA bulb is the most frequently specified front parking light across the Hyundai Elantra model range, appearing across the 1999-2003, 2007-2008, and 2013-2016 model years. It is an ANSI-standard dual-filament bulb rated at 12V with a high-beam filament drawing 26.9W and a low-beam filament drawing 8W, housed in natural amber glass and fitted with a BAY15d bayonet base.
• The natural amber glass of the 2357NA produces its amber output through the glass coating itself rather than through a clear lens with an amber-painted bulb. This is a relevant distinction for applications where the housing lens is clear or white.
• The 2357 bulb, specified for the 1992-1995 Elantra, shares the same BAY15d bayonet base and 12V/26.9W/8W dual-filament ratings as the 2357NA but lacks the natural amber glass. The two types are electrically and physically interchangeable, though the 2357 does not replicate the amber output of the 2357NA without a colored lens.
• The 1157 bulb, specified for the 1992 Elantra and for the 2019-2020 Elantra equipped with halogen capsule headlamps, uses the same BAY15d bayonet base as the 2357 and 2357NA but operates at lower wattage, rated at 21W and 5W across its two filaments. The 2019-2020 fitment is conditional on the headlamp type, meaning vehicles with a different headlamp configuration may not use this bulb.
• The PY21W, specified for the 2021 and 2023 Elantra, follows ECE regulations rather than ANSI standards. It is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base. The BAU15s base is offset at a different angle than the BAY15d base used by the 1157, 2357, and 2357NA, making these bulb families physically incompatible with one another despite similar wattage ratings.
• The 12961, specified for the 2018 Elantra, is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. This is a substantially lower wattage than all other bulbs in the specification and uses a wedge base rather than a bayonet base, making it incompatible with any other bulb type listed.
• The shift from ANSI-standard BAY15d bulbs in earlier model years to the ECE-standard BAU15s PY21W in the 2021 and 2023 Elantra reflects a change in base type that prevents cross-substitution. A BAY15d bulb cannot be installed in a BAU15s socket, and vice versa, due to the differing pin offset angles on each base.
• Across the full specification, three distinct base types are represented: the BAY15d bayonet base shared by the 1157, 2357, and 2357NA; the BAU15s offset bayonet base used by the PY21W; and the W2.1x9.5d wedge base of the 12961. None of these base types are interchangeable with one another.