[NonoxX]

Hi folks,
My 2010 N55 DKG 135i runs FBO, with JB4 and BEF. I had no issue, and for sure hope it lasts

It's my daily car, I drive quite a lot, and really need this car. In case my JB4 fails, for some reason, in the middle of nowhere, am I able to simply pull it off, and run on the BEF only? Sure, i guess it wouldn't be ideal. But at least, is it OK to drive, let's say ~1000km like that, till I can access what I need to reflash it to stock?

Thanks in advance.

[weehe126]

If you remove the JB4 you will have no boost control. Why can't you keep the phone/tablet and cable in your car?

[NonoxX]

Originally Posted by weehe126

If you remove the JB4 you will have no boost control. Why can't you keep the phone/tablet and cable in your car?

Simply because I don’t own one, and don’t plan buying one.

[weehe126]

Then how did you flash a BEF...

[Kevin39]

Also, how are you going to pull out the JB4 on the side of the road anyways?

[NonoxX]

Originally Posted by Kevin39

Also, how are you going to pull out the JB4 on the side of the road anyways?

It only requires a few basic tools which I almost always have in the trunk anyway, especially when I am far from home, which most likely means I’m there for work...

One more clever and faster way to pull it out would be to make a home made connector, that would take place of the JB4 in such cases. It would be a matter of minutes and a few dollars.
But that’s already way out of scope for this topic.

[NonoxX]

Originally Posted by weehe126

Then how did you flash a BEF...

Just had to borrow an android phone for half a day.

[RoarinForeign]

I was in a similar boat with using someone else's tablet. I caved and got an older Samsung prepaid phone on sale for like 50$ and I'm glad I bought it, so I'd recommend doing the same. A bef, flashes the piggy back not the ecu so I don't think you can have the bef without the piggy back

[weehe126]

The BEF flashes the DME, not the JB4...

[mike@x-ph.com]

If JB4 is off or not working, car will run just fine.
It will make less power and you would lose any of the Jb4 features, thats all

[RoarinForeign]

Originally Posted by weehe126

The BEF flashes the DME, not the JB4...

Sorry, My mistake !

[NonoxX]

Originally Posted by mike@x-ph.com

If JB4 is off or not working, car will run just fine.
It will make less power and you would lose any of the Jb4 features, thats all

I was pretty convinced that it would be the case, but I'm no expert.

Thank you and everyone else who contributed to this thread