Honda CR-Z front side marker bulb size measures 7443NA while rear side marker bulb size measures 168, with each bulb serving distinct lighting functions on the vehicle. The replacement chart covers 2011 to 2016 model years and contains bulb size specifications corresponding to each production year.
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 two distinct bulb types across its side marker positions: the 7443NA for the front and the 168 for the rear, covering all model years from 2011-2016.
The 7443NA is a dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W/5W output, meaning it operates one filament at higher wattage and a second at lower wattage depending on the lighting function active at a given moment.
The natural amber glass of the 7443NA produces a color output without the use of a colored lens or coating, as the tint is built directly into the bulb's glass envelope.
The 168 is a single-filament miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W, placing it among the lower-wattage bulbs commonly found in marker and courtesy lighting applications.
Both the 7443NA and 168 conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications within those markets.
The T20 and T10 designations refer to the outer width of the wedge base, with T20 being the larger of the two. These form factors are not interchangeable with each other or with bayonet-style bases.
The 7443NA designation distinguishes this bulb from the standard 7443, which uses clear glass. Substituting a clear 7443 in place of the 7443NA would alter the emitted color of the front side marker on the CR-Z (2011-2016).
The dual-filament nature of the 7443NA means the socket wiring at the front side marker position carries connections for two separate circuits, and a single-filament T20 bulb would not fulfill both functions if used as a replacement.