Motor, Train Base, 12V Modern Type I with 2 round contact holes
Part Number 501a
Name Motor, Train Base, 12V Modern Type I with 2 round contact holes
Category Electronics
Material Plastic
4 related parts (same mold or print family)

Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

Appears in 5 sets
Black (3 sets)
    Red (2 sets)