Hyundai Sonata Parking Brake Indicator Bulb Size

Additional Notes

• The Hyundai Sonata uses the 37 bulb size for the parking brake indicator across the 1989-2001 model years.
• The 37 bulb is classified as a T5 miniature wedge type, a designation that refers to the bulb's tubular shape measured in eighths of an inch, making it one of the smaller form factors used in automotive instrument and warning light applications.
• The wedge base design means the bulb is held in place by tension from the socket itself rather than by a bayonet or screw mechanism, which is a common construction for low-wattage indicator bulbs.
• The 37 bulb operates at 12 volts and draws 1 watt, placing it among the lowest power consumption ratings found in automotive signaling and indicator circuits.
• The 37 bulb carries ANSI standardization applicable in both the United States and Canada, meaning it conforms to a defined specification recognized across North American markets.
• Because the wedge base format comes in several widths, substituting a physically similar but dimensionally different wedge bulb risks a loose or incompatible fit in the Sonata's parking brake indicator socket.