The bus flies of into infinity after I press play:
Most of the time this is caused by self-collisions in the bus. Check in you BP if any clutter objects or decals in your bus have collisions enabled. Disable them if they are enabled.
Another point that could cause these issues are colliders in the physics asset which were not setup correctly.
The wheels are not turning:
The doors/the windscreen wipers/the driver door are not animating
Check if the bones in the “Layered blend by bone” node are matching the ones in the skeleton
Check if the BusState nodes are listening for the correct triggers
Check if the Doors are correctly setup in the bus bp
Lights are not turning on/ turning off
Camera position is wrong
The bus can’t be customized