The Hino FD2218LP headlight bulb specifications include H4651 size for high beam and H4652 or H4656 sizes for low beam applications. The replacement chart covers vehicle production years from 1993 to 1995 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H4651, H4652, and H4656 bulb types are all ANSI-standardized sealed beam units used across North America (US and Canada), operating at 12V and housed in a 4x6-inch rectangular form factor.
All three bulb types are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When the filament fails, the entire unit requires replacement rather than just an internal bulb.
The H4651 is specified for the high beam headlight position on the Hino FD2218LP across the 1993-1995 model years, indicating consistent fitment for that function throughout this period.
The low beam headlight position on the FD2218LP does not use a single bulb type across all listed years. The 1994 model year uses the H4656, while the 1993 and 1995 model years use the H4652.
The H4652 is a variant of the H4651 within the ANSI sealed beam family. Although both share the same 4x6-inch rectangular housing and 12V rating, they are designated for different beam functions and are not interchangeable between positions.
The H4656 and H4652 occupy the same low beam position but are assigned to different model years, which indicates that substituting one for the other without confirming the specific year of the vehicle would risk an incorrect fitment.