Honda Ridgeline Automatic Transmission Indicator Bulb Size

The Honda Ridgeline automatic transmission indicator requires a bulb size of 74 for the specific component located within the dashboard assembly. Data for the specified lighting component covers the range from 2017 through 2020.

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 Size
2017-2020	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The Honda Ridgeline uses the 74 bulb size for its automatic transmission indicator across the 2017-2020 model years.
The 74 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used in both the United States and Canada.
It is a T5 miniature wedge bulb, a form factor where the base is formed by the glass envelope itself, tapering to a wedge shape that clips directly into a socket without a separate metal base.
The 74 bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
At 1.4 watts, the 74 bulb draws very low power, which is typical for small instrument panel indicator lamps.
The T5 designation refers to the tubular glass envelope width, expressed in eighths of an inch, placing this bulb among the smallest in common automotive instrument cluster use.
Because the 74 is a wedge-type bulb, it is not interchangeable with bayonet or screw-base bulb types even when voltage and wattage ratings are otherwise similar.