[csehao]

so I have an 08' E90 328i with 95k miles that will not start. There is just a humming sound from the engine when clicking the start button. The humming sound goes lower and lower, till nothing happens.

Have tried to replace the battery, but still the same issue. During the week before the car completely no start, when I inserted the key fob, and started the car right away, there was a hesitation in cranking, took about 3 to 5 second to start. If I put the key fob, wait for a while then start, it starts normally.

What could be the issue?

Thanks