Some kind of mouse control is a good idea...... I had a $1500 bill to fix the wires which controlled one injection nozzle on my pickup truck....they had to remove the intake manifold to do the job.
Mouse traps can be put into PVC pipes with holes big enough for mine to enter.. but too small to be of danger to cats , etc....
There is also an excellent multi trap which does not require bait... and is no threat to cats....I have used this one and was pleasantly surprised by how effective it was... learned about it after the pickup problem....
Ketch All Mouse Trap, Kness Ketch-All