Mitsubishi Outlander Turn Signal Bulb Size

Additional Notes

• The 7440NA is the most frequently specified turn signal bulb across the Mitsubishi Outlander lineup. It is an ANSI-standard single-filament wedge bulb in the T20 form factor, rated at 12V and 21W, with natural amber glass that produces the required amber signal color without relying on a colored lens.
• The T20 wedge base of the 7440NA is a push-in connector type, meaning it seats directly into a socket without a separate locking mechanism or bayonet rotation.
• The 12496 is a Philips/Osram part number designating a specialty halogen bulb rated at 12V. It is specified for the front turn signal on the Mitsubishi Outlander for model years 2014-2020.
• The PY21W follows the ECE standard used in European and worldwide markets. It shares the same 12V, 21W electrical rating as the 7440NA but uses a BAU15s bayonet base, which is an offset-pin bayonet fitting. This base design prevents accidental installation of non-amber bulbs in the same socket.
• The 7440NA and PY21W are not interchangeable despite sharing the same wattage. The 7440NA uses a wedge base while the PY21W uses a BAU15s bayonet base, making the two physically incompatible with each other's sockets.
• The front inner turn signal position on the Mitsubishi Outlander is specified exclusively for model years 2003-2006, all using the 7440NA bulb.
• The front turn signal position transitions from the 7440NA to the 12496 between the 2013 and 2014 model years. These two bulb types are not confirmed as interchangeable, as the 12496 is a specialty halogen type with distinct application characteristics.
• The rear turn signal for the 2015 Outlander is the sole position across all three sub-parts to specify the PY21W, while the surrounding model years in that same position use the 7440NA, indicating a single-year fitment variation at that location.
• The rear turn signal for the 2014 Outlander specifies the 12496, placing it in contrast with both the 2013 and 2015 rear turn signal positions, which use the 7440NA and PY21W respectively.
• The rear turn signal position covers the widest model year span in the specifications, with the 7440NA appearing across the majority of those years from 2003 onward, interrupted only by the 2014 and 2015 entries.