The Lexus LX470 front turn signal uses a 12496 or PY21W bulb size, while the rear turn signal requires a 7440NA or 7440 bulb size. The replacement chart covers 1998 to 2007 model 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 Lexus LX470 front turn signal uses two distinct bulb types across its production run: the 12496, a Philips/Osram halogen bulb rated at 12V for specialty applications, and the PY21W, an ECE-standard single-filament amber bulb rated at 12V and 21W with a BAU15s bayonet base.
The 12496 front turn signal bulb was fitted to the LX470 for model years 1998-2000, 2004-2005, and 2007, while the PY21W was fitted for model years 2001-2003 and 2006.
The PY21W follows ECE standards, which are primarily associated with European and worldwide vehicle markets, and its BAU15s bayonet base is offset, meaning it is not interchangeable with standard BAY15s or BA15s base bulbs.
The rear turn signal of the Lexus LX470 uses bulbs from the T20 wedge family across all model years from 1998 to 2007, with the specific variant differing between earlier and later years.
For model years 1998-2005, the LX470 rear turn signal uses the 7440, an ANSI-standard single-filament T20 wedge bulb rated at 12V and 21W with a clear glass envelope.
For model years 2006-2007, the rear turn signal specification changes to the 7440NA, which shares the same ANSI-standard T20 wedge base and 12V, 21W rating as the 7440 but features a natural amber glass envelope rather than a clear one.
The 7440 and 7440NA share identical base types and electrical ratings, but substituting a 7440 for a 7440NA position would result in a clear rather than amber light output, which may not meet regulatory requirements in certain markets.
The front turn signal position on the LX470 does not use a consistent bulb type across its production years, meaning the correct bulb must be confirmed against the specific model year before replacement.
Both the 7440 and 7440NA are single-filament bulbs, confirming that the rear turn signal circuit on the LX470 operates independently from any combined stop or tail light function on the same bulb.
The PY21W and 12496 front turn signal bulbs are not interchangeable due to their different base types, the PY21W using a BAU15s bayonet fitting and the 12496 being a specialty halogen format, despite both operating at 12V.