Best not to hold your breath though...
Edit: "oh but it's an actual organization" yeah with still very little significance between pretending it's anything but a convenient proxy for the bigger members
I think your understanding of BRICS might be slightly outdated, did you read about the last time in the late 90s or something? It's beyond just an acronym today, with institutions actively involved, new initiatives and more.
It's a puppet show essentially
Either one gets rid of the oil trade-- which I think is quite feasible, then the need to acquire dollars to buy these products goes away, so there's nothing more needed, or one negotiates something with one of the many countries which either have or could acquire the ability to produce oil where one bypasses the dollar trade.
Maybe, if they didn't have Russia in the group and had talked to more people about the sanctions, something like 'we need this, and the alternative is Russia-- can't you be flexible and not sanction Venezuela', they could have even used Venezuela.