The Mazda RX-8 front side marker uses bulb sizes 1034NA, 1157NA, or 194, while the rear side marker requires size 12961. The replacement chart covers 2004 through 2011 production 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 Mazda RX-8 front side marker uses three distinct bulb types across its model years: the 194, the 1157NA, and the 1034NA.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W. It serves as the front side marker bulb on the RX-8 from 2004-2008.
The 1157NA is an ANSI-standard dual-filament bulb with a BAY15d bayonet base and natural amber glass, rated at 12V and 21W/5W. It is specified for the front side marker position on the 2009-2010 RX-8.
The 1034NA shares the same BAY15d bayonet base and natural amber glass construction as the 1157NA and is described as a variant of that bulb. It is rated at 12V and 21/5W, and it replaces the 1157NA as the front side marker specification for the 2011 RX-8.
Although the 1034NA and 1157NA share a base type and wattage rating, they are distinct part numbers. Substituting one for the other without confirming compatibility with the specific model year may result in an incorrect fitment.
The BAY15d base found on both the 1034NA and 1157NA is an offset dual-contact bayonet base. The offset pin arrangement prevents incorrect single-filament bulbs from being inserted in place of dual-filament ones.
The rear side marker position on the 2009-2011 RX-8 uses the 12961, a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W.
The 12961 and the 194 both occupy the T10 wedge form factor, but they carry different wattage ratings: 5W for the 12961 versus 3.78W for the 194. The two are not listed interchangeably within these specifications.
The front and rear side marker positions on the RX-8 do not share a common bulb type in any model year covered by these specifications.
The 194 is the most frequently specified bulb across the RX-8 side marker data, covering five consecutive model years in the front position from 2004-2008.