Integrated security systems provide the best combination of convenience and protection, but there are some more budget-minded alternatives out there.
A tough triple-laminated polyester coating can be applied to the inside of car windows that makes it time-consuming for a thief to gain access via the glass.
Having a vehicle's registration number etched into the window glass has been common for years, although no longer seems particularly popular. It's a major job replacing every window in a stolen car, so there's a reasonable chance that the crook will pick a car without the extra hassle factor. Unless he just wants a joyride.
Manufactured in a variety of shapes and sizes, wheel locks are attached to the steering wheel, preventing it from being turned. Years of testing all over the world has shown that a determined boot or even the right item from the home toolbox can defeat most wheel locks, but they remain a cheap and useful deterrent.
Variations include accelerator-, brake-pedal and gearshift locks.