Isuzu EVR License Plate Bulb Size

The Isuzu EVR license plate light requires a bulb size of 89 for the rear exterior lighting assembly. Data for the specified vehicle covers the period from 1987 through 1993.

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
1987-1993	89 (Heavy Duty)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89

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Additional Notes

The Isuzu EVR uses the 89 bulb for its license plate position across the 1987-1993 model years.
The 89 bulb is an ANSI-standardized type, meaning it conforms to a defined specification recognized across the United States and Canada.
It operates on a 12-volt electrical system and draws 13 watts, placing it in the lower-power range of bayonet-base automotive bulbs.
The 89 bulb uses a BA15s bayonet base, which is a single-contact fitting where the bulb locks into the socket with a twist.
As a single-filament bulb, the 89 is designed for a dedicated on/off function, with no secondary filament for dimming or dual-intensity operation.
The 89 is classified as a lower wattage variant of the 1156 bulb, which shares the same BA15s base but operates at a higher wattage.
The Heavy Duty designation applied to the 89 bulb in the Isuzu EVR specifications indicates a construction rated for the more demanding operating conditions associated with commercial vehicles.
Because the 1156 and 89 share the same BA15s base, physical fitment is possible between the two types, but the difference in wattage means they are not direct electrical equivalents and substitution may affect circuit performance.