ATF Fill Plug (24 mm) Part Number
I had difficulty locating this but I think I found the Toyota Part number for Toyota or Lexus vehicles that use the WS ATF fluid.
Depending on model, I've gathered that if anyone drains and fills their WS ATF, these are the plugs:
1) ATF Drain plug (14 mm)
2) ATF Check Plug (5 mm Hex) (some models also use this as a drain plug and check plug)
3) ATF Fill Plug (24 mm)
The 24 mm fill plug has these Toyota part numbers which I would imagine is universal for the Toyota (Lexus) family:
90341-18064
90341-18059
90341-A0003
If your model has a gasket for the Fill plug, I think it is part number:
90301-15004
Hope this helps



