I've only had this JCW for about a month now and when I throw it in manual mode or sport mode it idles and vibrates really rough. Anyone know the culprit?

Video attached.

https://youtu.be/At2h-xlPwr4?si=q2fXHCyJgt5LgSws

 

No specific ideas as to the culprit, but the difference between pushing it to the left and not as in your video is sport mode vs just plain "D" and that's it -- sport mode has a more aggressive shift curve, and sitting at idle like that when you move the shifter back-forth, I am pretty sure it might even downshift you (meaning all the way down to 1st gear and holding until you either move or shift again).

My 2017 F56 S does something similar in terms of the engine rhythm changing and even developing a little bit of a pulse -- but it isn't consistent in my case, and not sure I would describe it as "rough" in my particular case either.

 

I had the same issue as CJV2, 2016 F56S, I'd describe it as an idle change. It would rev its self up to about 2... then down low.. pulse a bit sit around 1.5. It was super annoying, would def notice it more after filling up the tank. Replaced the fuel tank breather valve. SUPER EASY and about 65$ on amazon. Problem fixed!

 

Awesome, I don't mind replacing it but I'd their any online guide or video?

 

This is the part I ordered... if you scroll down theres a picture of where it goes.. literally pull off the engine cover and its right in front of you. 2 hoses and a plug... the clips holding it on is a little finicky.

Amazon.com: 2 Port Fuel Tank Breather Valve Replacement for 2014+ Gen3 MINI Cooper F55 F56 F57 1.5T 2.0T 13907621174 : Automotive

https://youtu.be/8ToZT6HPfFg?si=mr5pdNMef8DYOq-_

and an interesting video of how to replace it haha. but it works.

 

Yep their is two design types, just make sure your design matches. We have the bosch one here: https://www.northamericanmotoring.co...0507-code.html