made a whining sound

Hi everyone, I need some help diagnosing a sudden whining noise on my BMW Z4 E89 sDrive23i (N52, manual gearbox). Symptoms: The noise only happens in 1st and 2nd gear Only between 1,000–2,000 rpm Only under acceleration / load Completely disappears above ~2000 rpm Cannot be heard revving the...

Hello Everyone! I am a brand new member, and I need some help diagnosing an issue with my motor; I do not want to have the same problem again, so your input is greatly appreciated! I have a '99, Z3, 2.5L, Auto. The other morning, my motor would not start; when I had turned the key, it had only...