Hyundai Sonata High Beam Indicator Bulb Size

Additional Notes

• The type 37 bulb is the sole bulb size specified for the high beam indicator across all listed Hyundai Sonata model years, spanning 1989-2001.
• The type 37 is classified as a T5 miniature wedge bulb, a designation that refers to its tubular glass envelope measuring 5/8 of an inch in width.
• The wedge base design means the bulb is held in place by tension from its socket contacts rather than by a separate metal base, which is a common construction for low-wattage instrument and indicator applications.
• The type 37 operates at 12 volts and draws 1 watt, placing it among the lower end of automotive indicator bulb power consumption, consistent with its role as a dashboard warning light rather than an illumination source.
• The type 37 carries ANSI standardization applicable in both the United States and Canada, meaning the specification conforms to a recognized North American industry standard rather than a proprietary sizing system.
• Because the T5 wedge form factor is shared by several bulb types with differing voltage and wattage ratings, substituting a physically similar bulb without matching the 12V, 1W electrical rating risks incorrect indicator brightness or premature socket wear.