I believe the ability to vote on the software version that your car is currently on would be great so people could see what the general consensus is for this particular version. Perhaps a star rating out of 5 or 10 would be good.
Could be broken down to bugginess, autopilot, FSD, feature set quality, etc.
People should only be allowed to vote on versions their car has been on, maybe current and their last version, anything before that should be locked for voting.
Customer support service by UserEcho