Call the person/people u left it with and ask? Or did u just straight up leave it there and hop in another vehicle? If that's the case I'd say if u were smart enough to leave it parked legally, call the cops and tell them where u left it and ur concerned it may have been burglarized. They might be busy and tell u to GFY or they might actually help u out and go check on it.

Your car will be very loud and not pass state inspection