+1
Vehicles definitly need 'upgrades' and teirs to security systems done by Mechanics at possibly a new garage opened specifiacally for lock upgrades. Slightly off topic but maybe 'physical' keys that are linked to your vehicles (could show up in /vehiclestats ie. [Vehicle] [Plate] [Keys:1] as I know actual physical keys would be a ballache) so when you buy a car your given a single key. But if you want to give a spare key to a friend or 2 you could go to the new garage and get a new key cut/coded - depending on the level of security which could cost more depending - which would increase the number of keys you 'have' and when you give someone a key that number changes respectivly.
lvl 0 - 'Stock Lock and Barrel' - No cost - Additional Key $1000 = Opened with bobby pin - Alerts Owner if failed lockpick
lvl 1 - 'Lock and Barrel, Fob' - $1500 - Additional Key $1750 = Opened with bobby pin but takes 1.5/2 times longer - Alerts Owner if failed
lvl 2 - 'Fob, Key Proximity Sensor' -$3000 - Additional Key $2500 = Opened with bobby pin and computer - Alerts Owner if failed or succeeded
lvl 3 - 'Top Teir Security System' - $5000 - Additional Key $3500 = Opened with bobby pin, computer and special decoder that official crim factions could get - Alerts Owner if failed or succeeded, also has a chance to alert owner as soon as the attempt has started