Thanks for the reply,
It is a 2007 Alphard 2.4 "g" (not 100% sure of trim level, sorry I'm a newb! Any pointers on how to work this out would be appreciated...) I believe it had 17" rims initially. It still has 17" rims.
Yes, I am mainly concerned regarding the insurance. If having these tyres makes my insurance void I would like to get it sorted asap.
If these tyres void my insurance I would like the dealership to replace them under warranty. The dealership obviously aren't keen. If I can prove that they are incorrect I can argue with them (hence wanting a definitive answer). If the tyres are absolutely legit, and don't count as a modification then I am perfectly happy with them.
Many thanks,