BMW 335d intermittent shutdown issue possibly related to fuel pressure or ignition relay on BMW 335d

Some BMW 335d owners report experiencing intermittent shutdown issues, where the car starts but only runs for 2-3 seconds before shutting off, and sometimes fails to start completely. Possible causes for this problem include malfunctioning fuel pump relay modules, fuel pumps, fuel rail issues, or complications related to fuel delivery and ignition. Some users suggest a workaround of turning the ignition to position II multiple times to activate the fuel pump before starting the car, which may help in certain situations. During diagnosis, it is crucial for owners to check for fuel delivery, fuel injector operation, fuel rail pressure, spark during cranking, and glow plug operation to effectively identify and resolve the issue.