Plaugues of rats are chewing and gnawing their way around rural Tararua, chomping on wiring in vehicles.
And at times mechanics at Jon Telford Autos in Dannevirke have had rats jump out at them from vehicles.
"If we see a mechanic moving fast away from a vehicle, we know there's a live rat," Craig Brown said.
For farmer Mark Redward, who lives east of Dannevirke, rats in his manifold have been a reality, with the pesky rodents taking up residence in two of his vehicles. Damage done to vehicles by rats who gnaw on wires, rip out insulation for nests, or squirrel away materials, can wreak havoc as Mr Redward has discovered.
"Rats chewing insulation makes an awful mess too," he said.