My new BMW came with one different brand tyre - should the dealer make sure all four are the same?

I've just bought a 2014, 20,000 mile BMW 320i xDrive M Sport from a BMW main dealer. The salesman told us it had new tyres all round. After delivery we noticed that it had three Pirelli PZero tyres and a Bridgestone Potenza was fitted. Dealer says this complies with BMW approved standards and will not change the odd tyre. What do you think?

Asked on 26 July 2017 by Galloper

Answered by Honest John
Demand that he fits an identical set of tyres with within two mm identical wear or that the dealer principal signs a paper to the effect that his dealership will be responsible for any problems at all with the xDrive for the next five years.
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