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.

• 18937c03 Vehicle Base 8 x 16 with Wheel Arches, Front and Side Studs, and 4 x 14 Recessed Studded Section, 3 Holes, Bright Pink Wheel Clip Pins Alternate of this part
• 65094c01 Vehicle Base 8 x 16 with Wheel Arches, Front and Side Studs, and 4 x 14 Recessed Studded Section, 5 Holes Mold of this part