ATM = New version of TCB which works with EVO.
Its wiring and trim removal type of job so if you've done speakers or speaker wires, this shouldn't be too difficult. I'd say 5 wrenches.
Yes, BMW services are still up with ATM (4G). No NAV functions are lost with this.
(This was the setup on 2017-2019 6 series cars and 2016-2018 F30s and then GXX series before they moved to MGU setup)
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