BMW 325i won't start despite lights functioning and key replacement on BMW 325i

Some BMW 325i owners report experiencing starting issues despite having functioning lights and replacing the key fob battery. These problems can stem from a dead or weak battery that, while able to power the lights, lacks sufficient charge to start the engine. Additionally, a faulty alternator may prevent the battery from receiving a proper charge, further complicating the starting process. Some owners also encounter difficulties due to a failed starter motor, which can inhibit the engine from cranking. In certain cases, a malfunctioning starter pump may also contribute to these starting problems. It is advisable for owners facing such issues to have their battery, alternator, and starter system thoroughly checked to accurately diagnose and resolve the underlying cause.