Quote:
Originally Posted by bousinou228i
Hello all,
I recently purchased a 228i M Sport with the n26 engine. I love the car! One of my fav BMWs I've owned for sure.
Ive had it for about a month now and there has been two instances on cold-morning starts where about 15-20sec into the start up cycle the exhaust makes a noise similar to the flap in my old 335, only to disappear followed by an electronic sound. (video link below)
It is still under the factory warranty and im wondering if I should make an apt. Have any of you experienced this?
Thanks in advance!
Jason 
https://www.youtube.com/watch?v=dgtT_kB3aeU |
The sound at the end is normal. It's the exhaust flap opening after a cold start. Your car should do that all the time about a minute after starting the car.
The rattle in the beginning is not normal but only a minor issue. I believe its a loose flap or just a random cold weather thing. There are other posts on this forum about it who were hearing the rattle consistently, and took it to the dealer to have it replaced under warranty.
I've only had that happen on 2 occasions on really cold days (each a about a year apart), and never bothered doing anything about it.