I live with my Mom and she lost two sets of keys in a month. I also live in the downtown area of a crime rid city and was kind of nervous at first but you can't live in fear. Get a new lock if that makes you feel more secure and for the car I will suggest you buy an inexpensive security system just in case. Good Luck to you:)Should I change my locks??
Yes i wouldShould I change my locks??
If you can afford changing all better change it. My parents lost their key once and changed all of the door locks and car locks. Even the gearbox lock is changed to ensure safety. Better safe than sorry. Stolen cars will depend on your insurance provider. You will need to ask them for that.