Mazda CX-5 Side Marker Bulb Size

Additional Notes

• The 12961 is a Philips-designated miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base and rated at 12V and 5W. It is a single-filament, low-wattage bulb suited to small marker light housings.
• The 7443 and 7443NA share the same T20 wedge form factor and dual-filament 12V, 21W/5W electrical rating. The 7443NA variant carries natural amber glass, which produces an amber output without relying on a tinted lens.
• The 1157NA and 1034NA are both dual-filament bulbs with a BAY15d bayonet base, natural amber glass, and a 12V, 21W/5W rating. The 1034NA is classified as a variant of the 1157, meaning the two share a close relationship in design but are not unconditionally interchangeable.
• For the Mazda CX-5, the front side marker uses the 12961 across the 2021-2023 model years, making it the most consistently specified bulb in the front position across the data set.
• The rear side marker of the Mazda CX-5 uses the 7443 for 2017-2023, with the 2017-2020 entries carrying a "Without LED Tail Lights" condition. The 7443 is the most frequently listed rear bulb across the specifications.
• The 2016 Mazda CX-5 front side marker has two distinct fitments depending on headlamp type: the 1157NA applies to vehicles with halogen capsule headlamps, while the 7443NA applies to vehicles with LED headlamps. These two bulbs differ in base type and are not interchangeable with each other.
• The 2019-2020 front and rear side marker entries both carry a "Without LED Tail Lights" condition, indicating that vehicles equipped with LED tail lights in those years fall outside the scope of these bulb specifications.
• The front side marker for the 2013 and 2015 Mazda CX-5 uses the 1034NA, while the 2014 model uses the 1157NA. Although the 1034NA is described as a variant of the 1157, the specifications list them separately by year, reflecting a distinction in the intended fitment.
• The rear side marker uses the 12961 across the 2013-2016 model years with halogen capsule headlamps in 2016, then transitions to the 7443 from 2017 onward, representing a shift from a 5W single-filament T10 bulb to a 21W/5W dual-filament T20 bulb between those generations.
• The natural amber ("NA") designation on the 1157NA, 1034NA, and 7443NA indicates that the amber color is produced by the glass coating on the bulb itself rather than by the lens. This is a relevant fitment consideration when the housing uses a clear or non-tinted lens.