rattletrap

A rickety, worn-out vehicle.

A shaky, rattling object; especially, a rattling, rickety vehicle; in the plural, objects clattering or rattling against each other.

Any machine or vehicle that does not run smoothly.

Mechanically unreliable or in disrepair.

A mechanical device, particularly an automobile, that is worn out, run down, or mechanically unreliable as indicated by noises it makes in operation.