I was sort of knowing before
I was sort of knowing before hand that the BMW X3 is going to get stranded if a tyre is flat as the 2009 X3 only has a space saver spare and the 2015 has no spare. The way out of this is to get a tyre repairing kit from amazon.com and a mobility kit from BMW. The repairing kit enable you to repair the tyre without taking the tyre off the car and the mobility kit enables you to inflate the tyre on the spot. I also add a pair of long nose pliers for pulling the nail out and a big handle round file to enlarge the nail hole so the repairing rubber plug can be inserted easily. I have repaired flat tyres more than 10 times without too much stress. I'd admit you do need to be a bit handy to do the job.