Relay/keyless-entry attacks — Criminals use devices to amplify a key fob’s signal so a car with keyless start/unlock can be opened and started while the owner’s key is inside a house or on the owner’s person.
Key theft or loss — Stolen or misplaced keys remain a simple way for thieves to take your car. House burglary is common for criminals to steal your car keys.
Tow/flatbed theft — Cars left unattended in unsecured areas can be lifted onto a truck and taken away with no warning to the owner.
OBD (diagnostic) port exploitation / electronics tampering — Attackers sometimes exploit onboard electronics or diagnostic ports to bypass factory immobiliser or program new keys; modern vehicles are increasingly computerised so your cars electronics are a target.
Key cloning / code grabbing — In some cases criminal groups clone keys or intercept rolling codes; manufacturers continually change protocols to limit this but the thieves are one step ahead of the car makers.
Cyberattacks — As vehicles become more connected, attackers target software vulnerabilities, this is rarer but growing and will be common place in the near future.