Honda CR-Z front turn signal bulbs use 7443NA or 7444NA sizes, while rear turn signal bulbs require 7440NA bulb size. The replacement chart covers 2011 through 2016 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda CR-Z uses T20 wedge-style bulbs across all front and rear turn signal positions for the 2011-2016 model years.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, and it serves as the rear turn signal bulb on the CR-Z for all six model years covered in the specifications.
The front turn signal positions use dual-filament T20 wedge bulbs, either the 7443NA or 7444NA, both rated at 12V with a 21W/5W filament configuration.
The "NA" suffix on the 7443NA, 7444NA, and 7440NA designations indicates natural amber glass, meaning the bulb envelope itself is tinted amber rather than clear.
All three bulb types listed conform to ANSI standards applicable to the United States and Canada.
The Honda CR-Z (2014 and 2011) uses the 7444NA for the front turn signal, while the 2011-2013 and 2015-2016 model years use the 7443NA in that same position.
Although the 7443NA and 7444NA share the same T20 form factor, voltage, and wattage ratings, they carry distinct ANSI part numbers and are not confirmed as interchangeable within these specifications.
The dual-filament construction of the front turn signal bulbs means each bulb contains two separate filaments, typically serving two distinct lighting functions within a single housing.
The single-filament 7440NA used at the rear operates only one circuit, consistent with a dedicated turn signal function rather than a combined stop or parking light role.