[Mixelplux]

Hi,

So I received this error 2 weeks ago. Paid the dealer $300 to diagnose and then they wanted $3000 to replace the TCB unit. Took it to my friend and they replace the TCB unit battery. The fault on the idrive and digital speedometer went away but everything is still not working properly. He scanned it and found the following:

S8410 functional limitations mobile device connection
S8411 functional limitations connected drive TCB

Does this mean by entire TCB unit needs to be replaced or is there a alternative solution?