Hello,

I have a 2013 E82 135is and am looking for information on doing software updates on my car. Specifically I have the problem with surging idle. I have had the car for 80k miles and have been just dealing with it. I love the car but have been considering trading it in because of this, I love the car otherwise and am considering doing a mini restoration instead.

I used to be one of Dinan's engineers way back in 2001-2006 but have gone on to work on other makes/models.

Can anyone enlighten me on what is needed to do this? I have searched but am not coming up with good information. Also, can anyone make recommendations on the best cable to buy for this?

Thank you,

Scott Tucker