Hyundai Excel Check Engine Bulb Size

The Hyundai Excel check engine light requires a bulb with the specific size 37 for proper installation within the instrument cluster. Data for the bulb size covers the range from 1987 through 1994.

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

Bulb Size by Year Range

Years	Bulb Type	Shop
1987-1994	37	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1W.	37	Check Price

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Additional Notes

The Hyundai Excel uses the 37 bulb for the check engine light across all listed model years, spanning 1987-1994.
The 37 bulb is an ANSI-standardized type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
It belongs to the T5 miniature wedge family, a designation that refers to the bulb's tubular glass envelope measuring 5/8 inch in width and a wedge-shaped base that friction-fits directly into a socket without a separate holder or locking mechanism.
The 37 bulb operates at 12 volts and draws 1 watt, placing it among the lowest-power bulbs used in automotive instrument panel applications.
The wedge base design of the T5 type means the electrical contacts are formed by the glass envelope itself rather than a separate metal base, which is a distinguishing fitment characteristic relevant to socket compatibility.
Because the 37 bulb is an ANSI-standardized part, it is interchangeable with any other bulb carrying the same 37 designation regardless of brand, provided the voltage and wattage ratings match.