This is the 1384th most frequent Polish word.
samochodzie
"Samochodzie" means "car" in the locative case (e.g., "in the car").
The word "samochodzie" is the locative case of "samochód" (car), used here to indicate the location where the album was found.
W samochodzie znalazłem stary album.
In the car, I found an old album.
"Samochodzie" here again is in the locative case, describing the place where the feeling of safety is experienced.
Czujemy się bezpieczniej w naszym starym samochodzie.
We feel safer in our old car.
In this sentence, "samochodzie" is used in the locative case to describe the place where the conversation occurred.