I don’t think year matters, especially since the 6 series is included in loyalty plus qualifications.
You do need an active registration or insurance. They do verify it for these rebates.
Also, loyalty must be in the same household for the last 12 months. People can’t use a family member’s car unless they actually live together/have used it as a legal address, i.e. if you are asked for proof of residency, you need to be able to provide it.
The title would be in my name/my address - no issue there. I guees I could put it on my insurance. I didn’t plan to register it, though I guess I could - I don’t see any issue with that. It’s literally a parts car…I’m just buying it for the title.