Mini cooper won't start

Start with basic troubleshooting. Assuming it doesn't crank or turn over. Check battery voltage, it should be minimum 12.4. Check the battery cables for corrosion and make sure they're tight. If cables are ok, check voltage signal at the starter solenoid as you try to start it.

This car is transponder equipped in the key if exposed to magnetic field such as a demagnitizer such as used for anti theft in stores it can damage transponder. Which will lock out fuel pump and starter. Turn key on look for an icon w a car w a lock through it or icon of a key or security flashing. If so youll need to have key reprogrammed at dealer.

Battery flat started with jump leads ran it for an hour and round block switched off won't 're start