Great write up, but I just want to warn everyone. I would NOT suggest for anyone to try this now.
There is an internal TSB note (or in fact an open technical enhancement campaign) on every single G70 produced to date now (am 100% sure about i7s, but not sure about 760/740). BMW is working on an actual full recall. There is a wiring harness and some cables (likely more relevant for i7 but am not sure) that can get blindly damaged or pinched due to how they are routed by factory behind or near the filter. There has been a number of reports internally within BMW by technicians damaging/pinching those cables accidently as the filter is being swapped out. Basically, during a microfilter or cabin air filter service), the harness can either: get pinched, get routed incorrectly, or develop abrasion over time.
The idea behind the current TSB is that for now, until a recall is issued, BMW has a technical enhancement campaign to make sure dealers carefully carries the filter swap following revised/new instructions, and then also inspect, reroute, and properly secure that harness every time the A/C filter is changed and look for potential damages from previous filter changes.
It might be best to let the dealer does this job for you (but please do ask them to pay attention to the note and not just skip it), or at least, be very well aware of the issue. If you can get a copy of the internal TSB and how to avoid potential cable/harness damage, that would be great. It is accessible to dealer within their internal notes as they pull the VIN.
The Enhancement code for this issue is 0061270900
Anyone can use this BMW Group wide website to look for things beyond recall, like this instance.
https://vehiclerecall.bmwgroup.com/i...uk&language=en