The Lexus LS460 has no belt it uses a chain as far as I can determine as Gates lists no belt for this model. Call your local Lexus dealer and verify this as I am not 100% positive.
IT don't have a timing belt to change.
there is no timing belt it has a timing chain
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Never as it does not have a timing belt, it has a chain.Never as it does not have a timing belt, it has a chain.
There is no belt to change; it uses an internal timing chain.
I know of no vehicle where the engine has to be removed to change a timing belt.