Has the vehicle been bought from an official Lexus Dealer ?
Rgardless of the answer (which I feel is still extremely important) I am of the view that the Member-Peter, should take his money back, as he is entitled to do and put the whole unfortunate exercise behind him immediately.
The questions surrounding a possibly sad outcome for the Lexus Dealership, involving many aspects of this case, are for the future and for other Organisations to consider.