International HX520 high beam headlight uses 9005 bulb size while low beam headlight uses H11 bulb size. The replacement bulb size chart covers 2018 to 2019 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9005 bulb serves as the high beam headlight across the 2018-2019 International HX520. This bulb type operates at 65 watts and produces a focused, high-intensity beam suited to long-range forward illumination.
The H11 bulb is specified for the low beam headlight position across the same 2018-2019 model range. It is a single-filament halogen type rated at 55 watts, designed to produce a wide, controlled beam pattern that limits glare for oncoming traffic.
The 9005 and H11 are not interchangeable with each other. Although both use single-filament designs, their connector housings, locking tab configurations, and wattage ratings differ, making cross-position substitution incompatible without modification.
The 9005 bulb belongs to the P20d base family and uses a push-and-twist locking mechanism for retention in the headlight housing. This differs from the H11, which uses a separate plastic collar and twist-lock system classified under the PGJ19-2 base standard.
Both bulb positions remained consistent across the 2018-2019 production years, indicating no mid-cycle revision to the headlight assembly specification during that period.