Hyundai Sonata Tail Light Bulb Size

Additional Notes

• The 2357 bulb is the most frequently specified tail light bulb across the Hyundai Sonata model range, appearing in the 1997-2001, 2006-2010, and 2016-2019 model years, with the 2016-2019 fitment restricted to vehicles equipped with halogen capsule headlamps.
• The 2357 is an ANSI-standard dual-filament bulb rated at 12V with a high filament draw of 26.9W and a low filament draw of 8W, making it the higher-output variant relative to the 1157 within the same bulb family.
• Both the 1157 and 2357 share the BAY15d bayonet base, which is a double-contact offset-pin base. This shared base type means the two bulbs are physically interchangeable in terms of socket fit, though their filament wattages differ.
• Because the 1157 runs at 21W/5W and the 2357 runs at 26.9W/8W, substituting one for the other in a socket designed for a specific rating may affect brightness output and could exceed the thermal tolerances of the socket or wiring.
• The 1157 is specified for the Hyundai Sonata in the 1989-1996, 2002-2005, and 2023 model years, representing a recurring fitment across a wide span of the model's production history.
• The 2024 Sonata uses the 12961, a Philips-designated miniature wedge bulb with a W2.1x9.5d base rated at 12V and 5W. This bulb type is fundamentally different in base design and power draw from the dual-filament 1157 and 2357 bulbs used in earlier model years, and the three types are not interchangeable.
• The W2.1x9.5d base on the 12961 is a single-contact wedge-style base, which is incompatible with the BAY15d bayonet sockets found in Sonata model years specifying the 1157 or 2357.
• The halogen capsule headlamp condition noted for the 2016-2019 model years indicates that the 2357 tail light fitment is trim-level or equipment-dependent, meaning not all vehicles from those years necessarily share the same tail light bulb specification.