Originally Posted by Gav-d3
I have a 2007 e90 pre LCI with the Professional HU
It doesn't have USB or bluetooth just the AUX input with old style gong !
Can I upgrade this without too much work ?
Any help would be great !
You have to follow the whole DIY...
1- Swap the HU
2- Install the USB wire and the USB socket
3- Install the MIC with its wire
4- Recode the new HU cheating your production date
5- Recode your kombi for getting the new DONG style.