Mazda 5 front turn signal bulbs utilize 1034NA or 1157NA sizes, while rear turn signal bulbs require 7440NA size. The replacement chart covers 2006 through 2015 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7440NA is a single-filament wedge bulb following the T20 form factor, rated at 12V and 21W, and it serves as the rear turn signal bulb across all Mazda 5 model years listed in the specifications.
The 1034NA and 1157NA are both dual-filament bulbs sharing the BAY15d bayonet base and a 12V, 21W/5W power rating, with natural amber glass, making them close variants of one another within the ANSI standard.
Because the 1034NA and 1157NA share the same BAY15d base and wattage ratings, their physical and electrical similarities place them in the same bulb family, though they carry distinct ANSI designations.
The front turn signal position on the Mazda 5 uses the 1034NA for the 2006-2010, 2012, and 2015 model years, while the 1157NA applies to the 2013-2014 model years.
The natural amber glass construction of the 1034NA, 1157NA, and 7440NA produces the amber turn signal color directly through the glass envelope rather than relying on a colored lens housing.
The BAY15d base found on both the 1034NA and 1157NA features two offset pins that prevent incorrect single-filament bulbs from being seated in a dual-filament socket, which is relevant when sourcing replacements for the front turn signal position.
Substituting a standard 1157 for a 1157NA, or a standard 1034 for a 1034NA, in a clear lens housing would result in a white rather than amber turn signal output, as the NA suffix denotes the natural amber glass coating specific to those variants.
The T20 wedge base of the 7440NA is a single-filament format, meaning a dual-filament T20 bulb such as the 7443 is not a direct replacement for the rear turn signal position despite sharing the same general wedge base family.