[16Alpina]

I'm a long time viewer, first time poster. So, I'm gonna get right to it, and hopefully I've posted this in the right spot.

I have a 2016 Alpina B6 (650i) with 80,xxx miles. I've owned it for 2 years and bought it certified from a BMW dealership w/ 70,xxx. The car has run strong and has never disappointed. However, when accelerating hard, I heard a pop, and the rpms almost hit redline before I let my foot off the gas. I then saw a small amount of smoke near the rear door/rear wheel area. I then noticed a grinding sound from under the car, which was relative to the rpms. As I gave it a little gas, the grind rpm increased, but the car did not move. I then tried reverse, which gave me a similar grinding noise, but at a faster rpm rate (probably because reverse is geared differently). This also did not move the car. The only time the grinding goes away is when the car is in neutral. I had it towed home on a flatbed.


Thanks,
16Alpina

1997 Z3
2004 M3
2016 Alpina B6