Acorns in my cars blower motor

How can I prevent mice/squirrels from hiding acorns in my car? I have a 2009 Honda Civic Coupe which is low to the ground, I have had it twice to the dealer to clean out acorns. The last time they pulled the blower motor and removed a bucket of acorns. How do the mice get in there and what can I do to prevent this? I do not have a garage to park in.

Thank you for any information.

Try parking somewhere else if possible like the street. Rodents will usually find a way in or around anything so they can hide food.

This is a real reach but you might try slopping a bunch of hot sauce around the suspected entry point. From what I have read rodents do not like hot food so maybe the smell would thwart their entry.

Block the cabin air intake with stainless steel wool. Chop the oak tree down.

Do a search on this site for the term acorns and you’ll find a number of prior discussions on this topic including suggested solutions.