Hi guys, new here.
I bought a 2021 Clubman JCW few months ago with 1k miles. It's a dealer's demo car. Now it's 5k miles. I don't remember when, but I started feeling engine rough idling, no matter cold or warm up. It's not continuous rough runing, but random little twitching. I can only feel it when idling, once or twice every 10 seconds without any rule. It feels very much like misfire but not that obvious and I can't feel it when the car moves.

No warning light/check engine light pops up.

Thus I plug in OBD MX+ and try diagnose with Bimmerlink. Misfire detected for all cylinders. I upload a .
I checked misfire detection counter and uneven running. From 00:35, I start to drive and you can see the misfire counter starts to count. However, in real life, when it was idling, the misfire counter also moves, randomly.

Plugs already replaced, no luck.

I'll take it to dealer in a few days since it's still within warranty. But any guessing and suggestions would be much apprecaited.


uneven runing of 4 cylinders when idling



misfire detected for multiple cylinders