xi won't start

[tracey]

I have a x 1 bmw 63 plate won't start and garage can't find fault turns over but won't start drove it the night before went to start in morning next day just wouldn't start 

[Greydog]

Morning Tracey

Welcome to the Forum

To run your engine needs Air, Fuel, Compression and if petrol a spark. So the fuel pump and its controlling relay and fuses need checking fuel delivery/testing. As does the whole delivery from the tank to the engine, fuel pressure needs checking at the fuel rail. The fact it happened so fast I would suspect a Fuse or Relay possibly a Crank sensor or fuel pressure sensor

To save a lot of time a Diagnostic session using a BMW capable scanner would help pinpoint te issue

Dave