So, it's winter

.
First year driving my BRZ, and won't be able to drive it for the next few months.
It'll be stored in my driveway very visible (without insurance) and basically if it were to be stolen during this period, I'm screwed.
All along I've been searching and comparing prices for car GPS trackers, steering wheel locks etc. but then realized, BRZ's have an engine immobilizer, correct? Meaning it can't be stolen without the cars near by. Or am I incorrect in this thinking and someone can still steal it without the keys?
It's a 2015 BRZ Limited 2.0.
Thanks!