Car thieves stole enough vehicles in Queensland last year to fill the Chermside and Carindale car parks, combined.

A favoured approach of thieves was to sneak into people's homes, steal their keys, and driving away with their cars.

Be careful where you leave your car keys. Credit:iStock

Car owners are being warned to be more diligent with their car keys as home driveways now become car thieves' favoured location from which to steal.

Car theft is on the rise, with 34 vehicles stolen across Queensland every day in 2012, a new “Car Security Index” shows.