[Jay43]

Im new to this forum so apologies if I make my self look like a fool. So I have a BMW M5 F90 2018. Whilst driving engine cut off at like 30mph. Does not start, it just does a click. Plugged in scanner and getting codes:

21a511
213007
213008
213009
030e08

I have checked these codes and they are linked to battery isolating switch/starter battery.

I previously changed coolant tank (leaking), coil packs 5 to 8 and all 8 spark plugs. Drove for 50 miles and then the engine cuts off.

Anyone else experienced anything like this? Battery was disconnected when work was carried out and then reconnected.

Any ides?