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.

• 2218c01 Duplo Car with 2 x 2 Studs and Yellow Base and Hubs this part is a alternate of it
• 2218c03 Duplo Car with 2 x 2 Studs and Green Base, Yellow Hubs Alternate of this part