Happens frequently in the US. Feral cats will also climb into engine compartments and wheel wells. For kitties’ sake, in the US, folks slap the fender to give cats a chance to get out before moving parts on a started engine hurt them.
The biggest thing, though, with mice is that they like to chew on wires. It might be worth it to have someone look at the wiring for chew marks before one of your lights goes out.