The Renault R18i high beam and low beam headlight bulbs both utilize the H6054 bulb size. The replacement chart covers vehicle production spanning 1981 to 1986.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6054 is the sole bulb type listed across all headlight positions in the Renault R18i specifications, covering both high beam and low beam functions for the 1981-1986 model years.
The H6054 is a 5x7-inch rectangular sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in the United States and Canada.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit requires replacement rather than an internal bulb alone.
The identical H6054 specification for both high beam and low beam positions indicates the Renault R18i uses the same sealed beam unit to serve both lighting functions, a design made possible by the dual-filament construction common to this format.
Because the H6054 is an ANSI-standardized sealed beam type, physical fitment is governed by the standardized 5x7-inch rectangular form factor rather than by manufacturer-specific tolerances, which generally allows interchangeability among compliant units from different producers.