Gather blocks: any solid blocks, stairs, slabs, trapdoors, glass, and black blocks for wheels
Choose a flat area for the car
Build a rectangular base for the chassis
Add a second layer for the body shape
Place stairs at the front and back for a car-like slope
Add slabs on top to smooth the roof
Use glass blocks or panes for windows
Add trapdoors or slabs as side details
Build four wheels using black concrete, black wool, or coal blocks
Attach the wheels to the corners of the base
Add headlights with glowstone, sea lanterns, or yellow blocks
Add taillights with red blocks or redstone lamps
Put a door shape using trapdoors or different-colored blocks
Add a steering wheel with a fence post and button
Decorate the interior with seats using stairs
Adjust the shape until it looks like a car
Copy the design if you want a larger version
Use different block colors for a custom style