well that was just too weird, after driving 20 mins back to my base I got out and suddenly everything is back to normal. It wasn't my imagination as I'd checked several times before reporting, I couldn't interact with the spark plug & battery or the inside of the car inventory as there was nothing being displayed in the "Vicinity" I'd just found a train and was unable to loot it as I couldn't place anything in the Olga as the inventory wasn't there. I then drove home to find it now working.

I have the exact same issue only it happens when exiting the game. I've checked my crash logs and found this:

Unhandled exception
ERROR      Program: E:\SteamLibrary\steamapps\common\DayZ\DayZ_x64.exe
Reason: Access violation. Illegal read by 0x7ff6d43293a3 at 0x26afa85d5e0

Olga's are spawning in on Ada spawn points and if you approach and interact with the car it has the potential to kill your character. I had one character killed as soon as I got inside to check the fuel level. The car will flip into the air and barrel roll if you remove a wheel from it. I've had this happen on 3 separate occasions. I have links to my Twitch channel to show the behaviour. https://www.twitch.tv/badboybubby1