So uh... Encountered a bug. When the Player and Natasha get in the truck to go to the city... The ignition sound keeps playing on repeat... Indefinitely. Even after the vehicle scene... And if you happen to save and quit during this and load... Yeah it's permanent.... That's all you hear for the rest of the game.
Edit; started a new game. Same thing happened but I pressed on without saving in the scene and thankfully it sorted itself out later.