I’m looking to do a transmission fluid drain and fill on my 2012 Lexus IS250 but after doing some research, I see TOYOTA TYPE T-IV and TOYOTA ATF WS. Which is the correct fluid for my car?
Also, would a drain and fill be a good idea at 119k miles. Not sure about the service history on it.
I would drain and fill now (with filter change if applicable). Then from this point onward stick to every 40,000-50,000 miles (I know Care Care Nut says 60,000 miles).
Your vehicle uses Toyota Genuine ATF WS. See page 529 of owners manual:
https://drivers.lexus.com/t3Portal/document/om-s/OM53A87U/pdf/OM53A87U.pdf
link above can be found under:
https://drivers.lexus.com/lexusdrivers/resources/owners-manuals?model=IS250&year=2012&type=om
Also, see at 6:08 by Toyota Master Mechanic The Car Care Nut to understand the different Toyota/Lexus ATF Fluid types:
https://m.youtube.com/watch?v=OJZLMIl6XPo