How to Replace Spark Plugs on a 2000-2005 Lexus LS430.
A magnetic Spark plug socket is a great tool for this job. I bought mine on amazon, please see link below.
Link: https://amzn.to/2BSOq5Y
This guide might be applicable for cars running the same 3UZ Engine I.E SC430 and GS430.
s2kandtheant.com