[Elfroggey]

To start, thank you for your time.
I have a BMW 335i convertible 2008 with the n54.

I’m fairly new to this car since I just got it a few months ago.

I haven’t had any issues with it whatsoever other than regular maintenance and the radio not working. (Yes it tried the bypass methods and it didn’t work)

But that was months ago and I chose to not worry about music as it’s not a necessity for me at the moment.

————-(you can skip to here if you don’t wanna read all that)—————-

Now the issue is the electric functions in my car stopped working.

I was driving to work as normal and my cluster, dash, idrive, & ac turned off. While driving but the car still turned on/off as normal and drives around.
Later while diagnosing at home I realized that the windows, power locks and convertible drop top stopped getting power too.

I checked every fuse I could and all were still good under the passenger side. I replaced the battery and plan on checking the alternator. (As I’ve been told to do)

I’ve been told it could be the Junction Box. But I want to know if anyone else has had the same issue or can point me in the right direction.

——————-
Long story short: no ac, windows, power locks, idrive, cluster, gauges, interior lights, and seats won’t move but car still cranks and drives.

I’m willing to answer any questions needed.

Ps. It has a jb4 piggy back tune and was told it can’t be that. But not sure if you ask me personally

[ctuna]

Do you know how to use a Voltmeter.
Start checking the Voltages for these devices at the Cabin Fuse Board.
Also there was a recall for the power connection to that same
fuse board at one point.

Are you sure the connection to the Cabin Fuse board at the battery is good?

If you want help for this type of problem you are better off in the General Sub Forum.
Seek out George he likes to give technical help.
i.e.
https://www.e90post.com/forums/showthread.php?t=2042022