As a fellow "new" X5D owner, I will recommend the Foxwell. ~$160-170 and it's a heck of a tool. I haven't personally used Carly, but the subscription model and all the add-on pricing really turned me off of it. I have been unable to get a working version of INPA/ISTA/whateverthehelltherussiansareprovidingonline, so I can't help with that one.


FWIW, I'm currently sorting thru the thermostat/low coolant temp issue on my 2011 X5D. It was running ~76-82C and never going into regen, so I replaced the thermostat and now it's running ~75-79C........so I'm probably gonna replace it again and hope I can get it up above 80C. Other than that, I have an active tank temp sensor error, and a problem with the active tank level sensor, so I ordered the VW/Bosch active tank repair and hopefully that will take care of both of those issues in one job (~$180 vs ~$1800 for full active tank replacement). Some day I'll probably delete but for now I'll keep everything until I come up against a $$$ emissions system repair, or the price of a tune and a DPF delete pipe come way down.