WallyF, sorry, you will not get Yokohama ADVAN - they are for M40i. Besides, I believe you want all seasons?
BMW, like most manuf., test and approve different tyres -e.g. no all seasons for Europe.
Tyres must fulfil a lot of criteria, and may differ from tyres bought elsewhere- although same designation.
It is unlikely BMW will approve shitty tyres, but there are still differencies - typically Michelin being "best". Current X4 M40i, came solely with Michelin Pilot Super Sport non-RFT.
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