It is best to avoid all possibility for a thief to target your car. When car thieves are looking for their next score, these are four things they love to see:
Easy targets. Cars parked in dark, isolated, or otherwise concealed area; vehicles that show obvious signs of neglect: a collection of parking tickets or just a coat of road dust, anything that suggests the owner hasn't been on the scene in a while.
Popular late-model cars. The list of most-stolen cars is topped by perennial best-sellers like the Toyota Camry, Honda Accord, Chevrolet Impala, and Ford F-150. These mainstream victims of theft arise from a set of factors: the black market for parts, the ease of breaking into them, and the anonymity of driving off in one from the scene of the crime. If you own one, the usual precautions apply, but additional protection (discussed later) might not just be a good idea, it may also reduce your insurance rates.
Cars with no visible, activated alarm system. Real-time vehicle tracking systems such as GM's OnSt ...