It is very very common for people to get rodents (mice, rats, possums) inside their vehicles in the Lower Mainland and Victoria areas. I know people who have had rats chew through the firewall in the engine compartment and into the passenger area -- chewing up the engine area so badly, the car wouldnt' start. I know other people who had rats chew from the undercarriage of the vehicle, into the trunk and then into the passenger area. These incidents are happening in pricey areas too, not the Downtown Eastside.
I know so many people this has happened to, all sorts of different vehicle makes (imports, domestics, etc).