BMW 740iL won't start after running for two hours and cutting off on BMW 740iL

Some BMW 740iL owners report experiencing starting issues after running for a couple of hours, which may be attributed to several potential problems. These include a dead battery or alternator issues, as some owners note that the engine cranks over but requires multiple attempts to start, often accompanied by dim interior lighting. Additionally, a failed starter can prevent the engine from starting despite cranking. Insufficient fuel delivery is another reported concern, where the engine struggles to start due to inadequate fuel supply after running. Problems with the ignition system, such as a faulty ignition switch or malfunctioning key chip, have also been cited as reasons for starting failures. Owners are advised to check battery health, attempt jump-starting, and inspect the starter motor, as well as to consider the possibility of immobilizer system issues. Furthermore, some have found that coolant leaks, ebox corrosion, and faulty sensors can contribute to these starting problems. Addressing these factors is crucial for effectively diagnosing and resolving the starting issues in the BMW 740iL.