This is the 11900th most frequent Russian word.
запчастей
"Spare parts."
The word "запчастей" in this sentence is in the genitive plural case, indicating possession or the object of the verb "получением" (getting).
У автомеханика были проблемы с получением запчастей.
The auto mechanic faced difficulties in getting spare parts.
Here, "запчастей" is also in the genitive plural case, used to denote the objects being enumerated, in this case "наличие" (availability).
На складе заведующий проверял наличие запчастей.
The warehouse manager was checking the availability of spare parts.
The word "запчастей" is used in the genitive plural case to describe the content of "широкий выбор" (a wide selection).