Unreliability of X3

In 2014 I purchased a brand new BMW X3 and in the year and a half that I have had it, it has broken down 4 times!!<br> <br> First it had a total systems failure (whatever that means!!) then the flat tyre monitor did not work costing me the loss of a very expensive run flat tyre. Thereafter it left me stranded on the N1 highway with a broken fuel pump