Growing rodent infestations are causing extensive and costly damage to vehicles across the UK, with insurers reporting a significant rise in related claims. Between 2023 and 2024, Aviva saw a 28% increase in reports of rodent damage to cars, with the average claim value rising 11% to £2,494.
"In winter, rodents seek warm nesting spots and can enter vehicles through tiny gaps," explained James Driscoll of Aviva. "Once inside, they chew wires, gnaw interiors, and nest in engines, causing major damage." Pest control expert Tony Smith describes the UK rat population as "out of control," linking the issue to modern vehicles' bioplastic wiring, which is attractive to rats.
The repair bills can be enormous. One Porsche Cayenne required a £7,000 repair for a new wiring loom. Garages report frequent jobs, from chewed gearbox looms to engine covers destroyed by squirrels. The British Pest Control Association notes a sustained increase in rat-related callouts over five years.
However, solutions are limited. Pest controllers are restricted from using permanent poisoned baits due to environmental laws and the cleverness of rats. This leaves motorists facing a persistent and expensive problem with no easy fix in sight.