The only DVSA recall for the M3W has been the brake pedal failure, a failure that could be catastrophic. This only applied to early cars with the laser cut "M3W" in the pedals, maybe the first few hundred but not the first 1027 with the pre-2014 chassis that were recalled. MMC assured the DVSA that when they checked the brake pedals on these cars they would also check the chassis for cracks, so the brake pedal recall information was sent to all these 1027 cars rather than have an additional recall. I got the recall information related to the "M3W laser cut brake pedal assembly" for my 2013 car, no mention of any other checks being carried out at the same time. I was fully aware of the chassis crack issues and knew my car was fine. My 2013 car didn't have the M3W laser cut early brake pedals detailed in the recall, so it didn't apply and never went for inspection, like possibly many others? The DVSA do not seem to attach the same importance to low volume cars as they do for more mainstream vehicles and tended to believe the manufacturer when they said they would do the right thing.... I doubt that a mention of chassis crack checks as well in the recall was desirable.
The DVSA did not consider the M3W chassis cracks to be "catastrophic", they would become apparent before a catastrophic failure, so they did not warrant a recall. To be honest the ones I have seen have been found before a big failure, although you may consider yourself lucky if you find a chassis crack before the accident.
There was no official recall for the very public failure of the early lower wishbones in the Autocar track test. I assume no one informed DVSA and an "informal" recall was done by MMC, some/many obviously got missed.
Have any Super 3 owners contacted DVSA about rear wheel bearings failing? It doesn't get done on it's own, you have to make a case to them. You cannot rely on the manufacturer to "do the right thing" and report themselves.
I guess not all recalls are equal, a lot possibly depends on the manufacturers attitude? I am sure many people, like me, have had recalls for "normal" cars for what they would consider to be very minor faults compared to chassis failures, things like rear parcel shelf latches and under bonnet loom security.