BMW 325Ci engine failure after sitting idle, won't stay running on BMW 325Ci

Some BMW 325Ci owners report experiencing engine failure after sitting idle, characterized by rough idle, fluctuating revs, and stalling. These symptoms may indicate problems with air intake or fuel delivery. Additionally, some owners find that disconnecting the Mass Air Flow (MAF) sensor helps diagnose potential issues related to the sensor or vacuum leaks that affect the air-fuel ratio. Error codes such as P0300, P1345, P1347, and P1351 may also be present, suggesting broader issues impacting engine performance. Furthermore, if the vehicle struggles to start, the fuel pump could be a likely cause, and it is advised to avoid excessive cranking while troubleshooting. Massive vacuum leaks may lead to poor engine performance and trigger engine management lights, while airflow blockages can prevent the engine from receiving the necessary air-fuel mixture for proper combustion. It is recommended for owners to conduct diagnostic tests to identify the exact issue before proceeding with repairs.