You're welcome !
The only one who despawned since 1.04 was that olga i have spoken about on my precedent reply.
Otherwise, i'm sorry but the only vehicle i repeared was a gunter that started to teleport me everywhere haha. But it probably was my connection this day. (Btw, it was the car spawn just below the "BEREZINO" title on the map, near the water pump if this may help).
Anyway, if i experience a car despawn time i'll keep you informed !

In T139366#1915087, @Geez wrote:

Hello julien19991227.
Was there a server restart in between you leaving the car and returning back to the place where it was?
Regards,
Geez