INFINITI QX60 Turn Signal Bulb Size

Additional Notes

• The 7440 and 7440NA bulbs are the most frequently specified sizes across the QX60's turn signal positions, appearing in both the front and rear sub-parts across multiple model years.
• The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, with natural amber glass that produces an amber signal color without relying on a colored lens or housing.
• The 7440 shares the same T20 wedge form factor, voltage, and wattage as the 7440NA but uses clear glass, meaning the amber signal color in that application is produced by the lens or housing rather than the bulb itself.
• The 7444NA and 7443NA are dual-filament T20 wedge bulbs rated at 12V with a 21W/5W output, indicating they serve two lighting functions within a single bulb, typically a brighter filament for signaling and a dimmer one for a parking or running light function.
• The 7444NA and 7443NA share the same voltage rating, wattage rating, T20 wedge base type, and natural amber glass construction, making them closely related within the ANSI standard family.
• The INFINITI QX60 front turn signal for the 2015 model year uses a PY21W bulb, which follows the ECE standard rather than the ANSI standard used in all other listed model years. The PY21W uses a BAU15s bayonet base, which is physically distinct from the T20 wedge base, making it incompatible with the bulbs specified for surrounding years.
• The 2014 front turn signal uses a 12496 bulb, a Philips/Osram part number designation for a specialty halogen application rated at 12V, rather than a standardized ANSI or ECE bulb type.
• The rear turn signal for the INFINITI QX60 transitions from the 7440NA in 2014-2015 to the clear-glass 7440 in 2016-2019, a distinction relevant when the amber color output of the bulb itself is a factor in the installation.
• The T20 wedge base is the dominant base type across the QX60 turn signal specifications, present in the 7440, 7440NA, 7444NA, and 7443NA bulbs, though the dual-filament and single-filament variants within this family are not interchangeable due to differing filament configurations.
• The PY21W and 12496 bulbs specified for the 2014 and 2015 front turn signal positions are not T20 wedge types and are therefore not interchangeable with any of the other bulbs listed in these specifications.