The Mack MRU headlight bulb uses H6024 size for both high beam and low beam applications. The replacement chart covers vehicle production years spanning 2011 to 2017.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mack MRU uses the H6024 bulb size across both high beam and low beam headlight positions for the 2011-2017 model years.
The H6024 is an ANSI-standardized sealed beam unit recognized in both the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6024 follows a 7-inch round form factor, a traditional sealed beam format historically common in commercial and heavy-duty vehicle applications.
Because the Mack MRU uses the same H6024 unit for both high and low beam functions, the headlight assembly relies on the sealed beam's dual-filament design to produce both outputs from one unit.
The shared H6024 specification across all listed model years indicates a consistent headlight assembly design throughout the 2011-2017 production span of the MRU.
The ANSI standardization of the H6024 means the unit conforms to fixed dimensional and electrical specifications, allowing interchangeability with other H6024-rated sealed beams from different manufacturers.