- I would like to change my car on my exsiting car insurance policy? Help? ""I have had my insurance policy on a peugeot 207 1.4 8v insurance group 3 since last december and would now like to change it to either a bmw 116i ig 10 or a bmw 120i ig 13. My policy cost 3500 how much will it increase by on either of these cars? Thank