I had an old 1.12 car custom command, and I moved to 1.13 and tried to break the car. Now the tires and headlights are stuck, what can I do to fix this?
The wheel is probably an armor stand. To get rid of it you can use this command:
/killcommand kills specified entities
@emeans to target all entities
type=armor_standmeans to only target armor stands
distance=..5means to only target entities within a block radius of 5 or under.
If it isn't an armor stand, you can find out what entity it is by going into spectator mode.