u/Curious_Sea_2638

I’m looking for ideas of possible causes. My son’s mini r50 won’t start. I thought it might be a starter motor but now not so sure. Battery is fine, solenoid is fine. Both me and mechanic are just stumped. No faults showing, nothing wrong showing with immobiliser on the scanner. I’m not very familiar with minis so please give me some ideas so I can make a list and just check everything and tick it off the box. Thanks